St. Xavier's College (Autonomous), 30 Mother Teresa Sarani Kolkata 700016 West Bengal, India

Students Section Staff Section

Department of Physics (B.Sc.)

Dr. Indranath Chaudhuri (IC), M.Sc (CU), Ph.D (CU).
Head of the Department

The Department of Physics, being one of the oldest departments of our Institution has a strong lineage related to science education in the state of West Bengal. It also has a robust foundation developed under the pioneering guidance of renowned Jesuits like Fr. Lafont in the middle of nineteenth century along with the contributions over the years from Fr. Verstraeten, Fr. Bonhome and others. Over the years, the department has grown into the present structure with UG, PG sections as well as research activities.


From July 2018, the Department has been in step with the CBCS curriculum in Physics at the undergraduate level. The current faculty members are dedicated towards bringing quality physics education to the students often supplemented with innovative methods of teaching and guided laboratory classes. The department is also one of the few to have supplemented the courses with computation at various levels of study early on.
At the Post Graduate Level, The Physics department offers M.Sc. course in physics. The department also has Ph.D. intakes. In the M.Sc. course two specializations are offered: (1) Astroparticle Physics and (2) Solid State Electronics. The students are exposed to computing tools and numerical programming using Python and Matlab. They also learn the technique of designing experiments through computer interfacing.


The department also manages the Father Eugene Lafont Observatory (FELO) which has been resurrected in 2014 by the initiative of departmental faculty members leveraging on the FIST grant and commensurate help from the college management. It now offers a twin setup, consisting of a stellar observatory with a motorized dome and a separate sliding roof observatory meant for solar observations. Apart from their serving as a standard lab facility for astrophysics students, they are routinely used for night sky observing programs for the College and University teachers as well as students from rural schools, often as a part of the PRAYAS initiative of the college. Some instances are the International “Observe the moon” event held for UG and PG students on 28th October 2018, the Total Lunar Eclipse was observed on 31st January 2018 and the National Science day program held on the 28th of February every year. Very recently an interdisciplinary astronomical society has been formed to kindle the spirit of inquisition and research among all students and systematize outreach activities.


The Solid State Electronics Laboratory has many electronics based experimental units related to both analog and digital communications, fiber optics and microcontrollers. Hall effect measurements and magneto-resistance setups are also included.


The Science Academies’ Lecture Workshop, jointly organized by The National Academy of Sciences, The Indian National Science Academy and the Indian Academy of Sciences are held in the department of physics on a regular basis. The Fr. Verstraeten Memorial lecture is also an annual lecture organised by the department with eminent scientists as invited speakers. The Physics department have also held a one of its kind refresher course in experimental physics jointly with the Indian Academy of Science with faculty members as resource persons. In association with FELO, several serial workshops like JESCOL and RAWA were held in previous years.


  1. 7th Father Verstraeten Memorial Lecture was delivered by Prof. Puragra Guha Thakurta, Chair and Professor/Astronomer, Department of Astronomy and Astrophysics UCO/Lick Observatory of California, Santa Cruz, USA on 30th August, 2019. The topic of his lecture was “Galaxies: Dark Matter, Cannibalism, Black Holes, Gravity Waves and the Periodic Table of Elements”.
  2. Golden Jubilee of SXC-70 Physics Batch celebration was held on 21st January, 2020.
  3. On 8th February, 2020 at Dr. Ranjan Ray Commemoration, Dr. Ananda Dasgupta, Associate Professor, Department of Physical Sciences, IISER, Kolkata delivered a lecture and Father Principal announced the name of computer centre for computational physics to be ‘Dr. Ranjan Ray centre for computational physics’. About 150 participants attended the meeting.
  4. The Postgraduate and Research Department of Physics at St. Xavier’s College (Autonomous), Kolkata, held their 12th annual departmental fest Spectrum on 20th of March, 2021. It was held on Microsoft Teams and streamed on YouTube, which was viewed by alumni from different corners of the world.
  5. On 30th April, 2021 at Dr. Ranjan Ray Commemoration, Dr. Sitabhra Sinha, Institute of Mathematical Sciences, Chennai, delivered a lecture on “To See the World in a Grain of Sand: How Physics Illuminates Life”.The students of St. Xavier’s College (Autonomous), Kolkata, as well as students from various colleges from all over India were fortunate enough to attend the webinar.
  6. Physics Colloquium Lectures:


a. Shibaji Banerjee, Dept. of Physics, St. Xavier’s College, Kolkata delivered a talk on “Dark Matter May be Strange” on 19th July, 2019.

b. Tapas K. Das, Harish-Chandra Research Institute, Allahabad delivered a talk on “Portrait of a dark face” on 9th August, 2019.

c. On 27th September, 2019 Dr. Suchetana Chatterjee, Dept. of Physics, Presidency University delivered a talk on ‘Supermassive Black Holes and their Host Dark Matter Halos’.


d. Rituparno Goswami, Associate Professor, School of Mathematics Statistics and Computer Science, University of KwaZulu-Natal (Westville Campus), Durban 4000, delivered a talk on “Tweedledum and Tweedledee” on 17th January 2020.

e. Dr. Puragra Guha Thakurta, Professor, Department of Astronomy and Astrophysics UCO/Lick Observatory, University of California Santa Cruz, delivered a talk on “The Andromeda Galaxy: A Testbed for Studies of Dark Matter and Galaxy Interactions” on 22nd February 2020.

f. Oindrila Deb, Postdoctoral Researcher, Physics Department, University of Basel, Switzerland, delivered a talk on “The Birth of Topological Insulators” on 28th February, 2020.

g. On 14th August 2020, Dr. Sayan Basu of University of Pretoria and SARAO, South Africa, delivered an online talk on the topic entitled “A Slice of Heavens – Rising Above the Pandemic”. It was followed by a students’ presentation organized by Xaverian Astronomical Society.

h. On 30th September 2020, Srubabati Goswami, FNA, Senior Professor at Theoretical Physics Division, Physical Research Laboratory (PRL), India, delivered an online talk in the National Webinar organized by the department on the topic entitled “Neutrinos: From Impossible Dreams to Unreachable Stars”.

i. Dr. Betti Hartmann, Dept. of Physics and Earth Sciences, Jacobs University Bremen, Germany delivered a talk on “Black Holes with Hair” on 26th February, 2021.

Workshops and Faculty Development Programmes

  1. A one-day international workshop on coarse geometry was organized on 16th August 2019 by the department of Physics in collaboration with Department of Mathematics of St. Xavier’s College, Kolkata. The speaker was Dr. Atish J. Mitra of Department of Mathematics, Montana Tech (University of Montana), USA.
  2. On 29th August 2019 Department of Physics conducted national workshop on “Role of DFT in predicting electronic structures and reaction pathway” in collaboration with Department of Chemistry. Prof. Swapan K. Pati of JNCASR and Dr. Anoop Ayyappan of Dept. of Chemistry, IIT Kharagpur delivered lectures in the workshop.
  3. In 16th and 17th December 2019 Department of Physics along with Department of Statistics in collaboration with IUCAA centre for astronomy research and development organized a two-day national seminar on “Application of Statistics in Natural Sciences”. The invited speakers who delivered talk in the seminar were Prof. Mihir Arjunwadkar of Pune University, Prof. Saurabh Ghosh of ISI Kolkata, Prof. Supratik Pal of ISI Kolkata, Prof. Rajesh Kumble Naik of IISER Kolkata and Prof. Ayanendranath Basu of ISI Kolkata.
  4. A two-day DBT sponsored Faculty Development Programme was organized on 10th and 11th January 2020 on Experimental Physics at Graduate Level: Scopes and Challenges.

Student Achievements

(Physics Hons. 2017-2020 batch)

Ayshi Mukherjee has obtained All India Rank 11 in Joint Admission Test (JAM) Physics paper. She also obtained All India Rank 12 in Joint Entrance Screening Test (JEST) Physics paper.

In the month of January 2020, the NGPE exam organized by IAPT was held in our college and she was one of the Top 25 students and hence, she qualified for the next level of the examination which was an experimental round.  She was declared as a NGPE Gold Medalist and eligible for a cash prize of Rs. 20,000/-.


C B S Socrates, Anindita Sarkar and Ayantika Saha are also among the NGPE – 2020 National toppers.


Ayshi Mukherjee joined Tata Institute of Fundamental Research (Mumbai). Aryaa Dattamunsi and Rahul Saxena joined IIT(ISM) Dhanbad. Anindita Sarkar joined IIT Madras. Supritha Bhowmick joined IISER Pune. Ayantika Saha and Avishuman Ray joined IIT Kanpur. Aritra Paul joined IIT Bhubaneswar, Sounak Sengupta and Sharmistha Baidya joined IIT Guwahati, Tamoghna Roy joined ICTS, Bangalore, Debapriya Sil and Debangan Maji joined University of Calcutta, Biju Saha joined Jawaharlal Nehru University, Sounak Samanta joined IIEST, Shibpur, Ayaskanta Ghosh joined NIT, Warangal, Sarbajit Dutta joined JNCASR, Bangalore, Animesh Maji joined Benaras Hindu University, Writabrata Sengupta joined Presidency University, Kolkata (as JRF under Project Funded By Board of Research in Nuclear Sciences), Ilika Banerjee, Siddhartha Sen, Ankit Kumar Gupta, CBS Socrates, Apratim Ghosal and Hrishav Das are continuing there studies at St. Xavier’s College (Autonomous), Kolkata.


Shaashwat Saraf joined dept. of Materials Science and Metallurgy, University of Cambridge, Selwyn College to pursue M.Phil in Micro and Nanotechnology Enterprise in the year 2021.



(Physics Hons. 2018-2021 batch)


  1. Pratul Manna – NGPE 2021 , National topper in top 25
  2. Sulagna Dutta – NGPE 2021, National topper

3.M.S.Dinesh – AIR 79 in JAM 2021

  1. 4. Mehraj Chhetri – AIR 81 in JAM 2021
  2. 5. Debonita Saha- Summer Internship, Bose institute, 2019
  3. 6.  Kaushik Pal – IUCAA summer school in May 2021


Mousumi Mitra joined IIT Gandhinagar. Sulagna Dutta joined Tata institute of fundamental research, Mumbai for  Integrated Phd in Condensed matter physics , Shramana Bera, Rivu Kayal, Anwesha Ganguly, Debalina Kar, Indranil Kuthe, Kobid Deb Roy, Manisha Dutta, Varsha Biswas, Arup Ghosh, Sayantani Banerje,  and Wrik Banerjee joined St. Xavier’s College, Kolkata, Debraj Dutta joined Satyendranath Bose National Center For Basic Sciences for Integrated PhD programme, Subham Das and  Md Sariful Islam joined IIT KANPUR,  Sagnik Ray joined IISER Thiruvananthapuram for Integrated PhD, Nilabja Ghosh joined M.Sc. in Big data analytics Ramakrishna Mission Vivekananda Educational and Research Institute, Mehraj Chhetri and M.S.Dinesh joined IIT Madras.

Research Activities in the Department:

  1. Sarbari Guhaand Samarjit Chakraborty, published a paper on 24th March 2020 in International Journal of Modern Physics D (Vol. 29, issue 05 (2020) pp. 2050034.)
  2. Samarjit Chakraborty and Sarbari Guha, published a paper on 27thNovember 2019 in General Relativity and Gravitation ( 51, issue 11 (2019) pp. 158)
  3. Gayatri Banerjee, published a paper on 30th August 2019 in Materials Today Proceedings (Volume 18, Part 2, Pages 494 – 500)
  4. Atasi Chakraborty1, Arup Chakraborty1, Soma Ghosh2, Indra Dasgupta1, published a paper on 20th January 2020 in Condensed Matter (Volume – 32, Number – 16, Page – 165802 (9pp))
  5. Desiccation cracks formed in Laponite® suspensions of varying pH: aid to analyzing clay microstructure. S Haque, S Tarafdar, T Dutta, Physica Scripta 95 (8), 085703, 2020, IF: 1.985
  6. Branched crack patterns in layers of Laponite® dried under electric fields: Evidence of power-laws and fractal scalin. A Ghosh, T Dutta, S Tarafdar, AK Ghosh, The European Physical Journal E 43 (6), 1-6, 2020, IF: 1.812
  7. Memory of rheological stress in polymers using Fractional Calculus. A Bhattacharyya, P Nandi, S Hazra, T Dutta, arXiv preprint arXiv:2001.06620, 2020
  8. Narrowing Desiccating Crack Patterns by an Azeotropic Solvent for the Fabrication of Nanomesh Electrodes R Pujar, A Kumar, KDM Rao, S Sadhukhan, T Dutta, S Tarafdar, Langmuir 35 (49), 16130 -16135, 2019, IF: 3.557
  9. A spring network simulation in three dimensions for designing optimal crack pattern template to fabricate transparent conducting electrodes. S Sadhukhan, A Kumar, GU Kulkarni, S Tarafdar, T Dutta, Bulletin of Materials Science 42 (5), 1-14,2019, IF: 1.392
  10. Subhankar Ghosh, published a paper ‘Optimization of Rare Earth (Er3+) Doping Level in Lead Zinc Phosphate Glass Through Judd-Ofelt Analysis on 1st May 2020 in Materials Chemistry and Physics (SCI: Elsevier) (Vol 246, P – 122802)
  11. Triloki Prasad, Subhankar Ghosh and Asis Goswami “Static Balance Ability of Visually Impaired and Partially Sighted Persons on Firm and Foam Surfaces” in press, EUJAPA, 8th May 2020 doi: 10.5507/euj.2020.002 (SCIMAGO h-index 4 )
  12. Madhurima Pandey, Debasish Majumdar, Ashadul Halder, and Shibaji Banerjee, published a paper on 10th October 2019 in Physics Letters B (Volume 797, Page 134910)
  13. Subhankar Ghosh‘Scientific Activities of Fr. Alphonso De Penaranda: A Jesuit Priest in the late Nineteenth Century’, Indian Journal of History of Science, 54.2 (2019) 215-217 DOI: 10.16943/ijhs/2019/v54i2/49664
  14. Triloki Prasad, Subhankar Ghosh and Asis Goswami “Walking Pattern of Sighted Volunteers with Open Eye and Closed Eye Conditions” JODYS, July 2019
  15. Sarbari Guha and Sucheta Datta, Axial Gravitational Waves in Bianchi I Universe, International Journal of Modern Physics D, 29, (2020) 2050116.
  16. Sarbari Guha and Samarjit Chakraborty, On the gravitational entropy of accelerating black holes, International Journal of Modern Physics D, 29, (2020) pp. 2050034.
  17. Impact of varying preparation methods of colloidal suspensions on droplet desiccation patterns on hydrophobic and hydrophilic substrates. A Khatun, S Haque, S Tarafdar, T Dutta, Physica Scripta 96 (2), 025211, 2020,
  18. Understanding flow features in drying droplets via Euler characteristic surfaces—A topological tool A Roy, RAI Haque, AJ Mitra, MD Choudhury, S Tarafdar, T Dutta, Physics of Fluids 32 (12), 123310,2020,
  19. Addressing gamma-ray emissions from dark matter annihilations in 45 milky way satellite galaxies and in extragalactic sources with particle dark matter models: Banerjee, A. Halder, M. Pandey and D. Majumdar, 2020, Monthly Notices of the Royal Astronomical Society 500 5589
  20. Lower bounds on dark matter annihilation cross-sections by studying the fluctuations of 21-cm line with dark matter candidate in inert doublet model (IDM) with the combined effects of dark matter scattering and annihilation: Banerjee, R. Basu, M. Pandey and D. Majumdar 2020, arXiv:2010.11007
  21. Chandrasekhar limit for rotating quark stars: Banerjee, A. Halder,S. K. Ghosh and S. Raha, 2021, Phys. Rev. C 103 035806
  22. Bounds on Abundance of Primordial Black Hole and Dark Matter from EDGES 21cm Signal: Banerjee, A. Halder, 2021, Phys. Rev. D 103 063044
  23. Beyond-Newtonian dynamics of a planar circular restricted three-body problem with Kerr-like primaries, S De, S Roychowdhury, R Banerjee Monthly Notices of the Royal Astronomical Society 501 (1), 713-729
  24. Universality and herd immunity threshold: Revisiting the SIR model for COVID-19, S Chowdhury, S Roychowdhury, I Chaudhuri, International Journal of Modern Physics C, (2021) 2150128

Invited Lectures


1.Dr. Tapati Dutta, delivered a lecture in the International conference ‘Droplets 2019’,16-18 September 2019:  Durham, UK

  1. Dr. Subhankar Ghosh delivered DBT sponsored lecture at Jhargram Raj College 25th Feb 2020
  2. Dr. Subhankar Ghosh regularly delivered talk for the INSPIRE Program held at JBNSTS, Kolkata in 2019-2020.
  3. Dr. Suparna Roychowdhury delivered a Seminar at Presidency University, Dept of Physics, or 3rd April. Title: Galaxy Clusters & Active Galaxies – an Explosive Rendezvous
  4. Dr. Suparna Roychowdhury delivered a seminar at Uniexplore 2019, Vivekananda College, Kolkata (one day seminar)  on 7th November, 2019 Title: The Cosmic Symphony – Hum of Creation!
  5. Dr. Sarbari GuhaInvited speaker and Member of the International Scientific committee at the International Symposium on “Nonlinear Dynamics” organized by the Mathematical Institute of the Serbian Academy of Sciences and Arts, in Belgrade during September 2019.
  6. Dr. Sarbari GuhaPresented an Invited talk entitled “Non-Linear Dynamical Systems in General Relativity and Cosmology”, at the International Symposium on “Nonlinear Dynamics”, Belgrade, Serbia, 04-06 September 2019.
  7. Dr. Sarbari GuhaDelivered an Invited Lecture on Some Aspects of General Relativity and Cosmology, at the Mathematical Institute of Serbian Academy of Sciences and Arts, Belgrade, on September 09, 2019.
  8. 9.  Dr. Sarbari GuhaScientifically interacted with the faculty members, students and postdoctoral fellows at the Serbian Academy of Sciences and Arts, Belgrade, Serbia, during 9th and 10th September, 2019.
  9. Dr. Sarbari GuhaPresented an Invited Lecture entitled “The problem of Gravitational Entropy” in the One-day seminar on “Gravity, Cosmology & Astrophysics – Recent Trends in Research”, at the Department of Physics, Jadavpur University, on 6th March 2020.
  10. Dr. Sarbari Guha  Presented Five papers at the International Conference on Gravitation and Cosmology (ICGC 2019) at IISER Mohali, during 10th to 13th December, 2019, including one invited lecture entitled “Generalized Second Law of Thermodynamics in FRW Universe with Chaplygin Gas Models”.
  11. Statistical modelling of drying dropletsTapati Dutta , 29-30th June, 2020; Webinar on Droplets and their drying patterns, Organised by CUTN.
  12. Flow features in drying droplets via Euler characteristic surfaces—A topological tool-Tapati Dutta, 11th January, 2021, Condensed Matter Research Centre, Jadavpur University.
  13. Chandrasekhar limit for quark stars: A model building approach
    19th December, 2020, Bose Institute (The Centre for Astroparticle Physics and Space Science (CAPSS)) by Dr. Shibaji Banerjee
  14. Beyond Newtonian Dynamics of a planar Circular-Restricted Three-Body Problem with Kerr-like primaries, invited lecture at University Oldenburg – Online, Speaker: Suparna Roychowdhury (St. Xavier’s College Kolkata, India), date: 26th January, 2021.

Outreach Activities (Popular Lectures):


  1. Lecture for School Children on Learning Physics through Games & Sports JBNSTS, Kolkata, WBDS in July, 2020 by Dr. Subhankar Ghosh



  1. Design (No 313731-001) of “MULTI-DIRECTIONAL BALANCE TEST EQUIPMENT” registered on 22.01.2021 (at RKMVERI, Belur)
  2. Dr, Subhankar Ghosh has a Design Patent (GOI): dated 15.05.2019

No 305795″Audio game Set for the Visually Challenged” in collaboration with RKMVERI, Belur Math

Training received by the faculty:

  1. Aditi Ghosh has successfully completed a course titled “Effective and Efficient Online Teaching in the Age of Corona, A Hands On Workshop” organised by Teaching Learning Centre (ICT) at IIT Bombay on 17th May,2020.
  2. Sanghamitra Das participated in ‘The BodhiTree and SAFE Tools for Effective Online Teaching: A Hands-On Workshop’ on 21 June 2020
  3. Sanghamitra Das successfully completed the course on online teaching skills between 15 June,2020 – 20 June,2020.
  4. Sanghamitra Das has enrolled for the course titled “Refresher Course on Teacher and Teaching in Higher Education” on SWAYAM for ARPIT 2020’ (Duration Dec 2020-Mar 2021).
  5. Aditi Ghosh has enrolled for the Refresher Course (ARPIT) on “Introduction to Quantum Physics and its Applications” organised by SWAYAM Team (Duration Dec2020-Mar2021).

Department Report

Annual Report 2020-21


Students Activities

Syllabus and Q-Bank

Course Structure