Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
If the energy of a photon is $10 \mathrm{eV}$, then its momentum is
PhysicsDual Nature of MatterBITSATBITSAT 2011
Options:
  • A $5.33 \times 10^{-23} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
  • B $5.33 \times 10^{-25} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
  • C $5.33 \times 10^{-29} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
  • D $5.33 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
Solution:
1046 Upvotes Verified Answer
The correct answer is: $5.33 \times 10^{-27} \mathrm{~kg} \mathrm{~m} / \mathrm{s}$
Momentum of a photon $\propto \frac{\mathrm{E}}{\mathrm{c}}$
$$
=5.33 \times 10^{-27} \mathrm{~kg} \mathrm{~ms}^{-1}
$$

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.