Modern Physics : Quick, simple, and easy

Everyone knows what modernity stands for, right? Speed. Yup, that’s the answer. And how do we achieve it…. Well, we use short cuts, tricks, slangs, etc. Everyone knows what “IDK’ stands for, right? Such a long line….shortened into three letters. Yeah, that is the new modern generation. Quick, fast and short. Presenting the shortest unit of the enitre JEE syllabus, something as short as its modernity and as quickly understood… Yup, you guessed it right. It is none other than Modern Physics, the most scoring unit of JEE Physics.

THE SYLLABUS :  You are expected to know the following stuff… 

  • Nuclear Models like Thomson Model, Rutherford’s Model and Bohr’s Model. The formulae and derivations related to Bohr’s Nuclear Model are extremely important, and a lot of questions are based on it in JEE.  
  • Photoelectric Effect, Planck’s equation. These are the two easiest parts of Modern Physics. Extremely scoring. However, make sure you practice the questions involving force and potential in photoelectric effect. Also, you will face questions involving work function. Prepare these well.
  • X- Rays and their spectral properties – characteristic and continuous spectra. These are quite important, but easy. Understand it well, and you will never lose marks here. Make sure that the concept of minimum wavelength for continuous spectrum is clear in your mind. 
  • Basic theory like Spectrum of Light, theory on Schrodinger equation, etc. as is mentioned in NCERT



  • NCERT is the godbook here. Every bit of theory given in it is a must. Read it carefully. JEE makes exact questions of this chapter from NCERT theory. Those who do not read it lose marks (Even Satvat Jagwani, AIR 1 at JEE 2015, claimed to have lost 5 marks because of this negligence of NCERT. This was while i interviewed him).
  • H.C. Verma is important for this chapter. The questions given in Solved Examples are more than enough, however. Unsolved exercise questions involve unnecessary calculations and tend to be boring. If you have understood the concepts, then omit these. If not, then solve the unsolved exercises as well.
  • Nothing else is needed after solving the above two books. However, if you have joined a coaching then solve the worksheets provided to you by your institute. They will be helpful.


  • Make sure that you know the theory well. This is because a lot of direct questions based simply on theory are asked from this unit. Use NCERT and HCV for this, collectively.
  • Develop question solving skill by practising from HCV. Nothing else is needed though you may also use NCERT Exemplar for questions.
  • Make it a point to solve the questions of this chapter in a modern way i.e. with a good speed. This is because this chapter is like the inorganic of physics… easily solved and heavily scoring.
  • Prep up you calculation skills. This chapter demands extensive calculations at times. Make sure that big decimals (say, 7 decimal points) do not scare you from attempting a question.
  • Revise it again and again. This is because a thing that you learn easily is forgotten easily also.

There it is…. Modern Physics 101 at your doorstep (or screenface?). Prepare well. After all, we are here to guide but you are here to work hard.

Best of Luck (feel free to contact us),

Aakash Kapoor (Founder, Prepsera)

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