JEE Main 2018 — Atomic Physics Question with Solution
JEE Main 2018 (15 Apr Shift 1 Online)
Question
Two electrons are moving with non-relativistic speeds perpendicular to each other. If corresponding de Broglie wavelengths are and , their de Broglie wavelength in the frame of reference attached to their centre of mass is:
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Momentum (p) of each electron and
Velocity of centre of mass
Velocity of 1 st particle about centre of mass
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Atomic Physics chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2018, covering the Atomic Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.