Calculate threshold frequency | Dual nature of light | Physics | Khan Academy

When light of frequency 2.42 X 10^15 Hz is incident on a metal surface, the fastest photoelectrons are found to have a kinetic energy of 1.7eV. Find the threshold frequency of the metal.
Let's explore how to use Einstein's photoelectric equation to solve such numerical on photoelectric effect.

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Created by Mahesh Shenoy