Chapter 77 of 2364 min read
Photoelectric effect and Einstein's equation
Why this is asked: Increasing light intensity increases the number of photoelectrons, not their maximum kinetic energy — that depends only on frequency, KEmax = hν − φ — and below the threshold frequency, no electrons come out no matter how bright the light is.
This chapter is part of a paid pack
A sample of the book is free to read — the rest, including this chapter, unlocks with full access.
See pricingTest yourself
- •Which of the following options (graphs A–D shown) represent the variation of photoelectric current with the property of light shown on the -axis?
- •If is the velocity of light in free space, the correct statements about a photon among the following are: A. The energy of a photon is . B. The velocity of a photon is . C. The momentum of a photon is . D. In a photon–electron collision, both total energy and total momentum are conserved. E. A photon possesses positive charge. Choose the correct answer from the options given below:
Open this in the full syllabus view · Physics