Dual Nature of Radiation and Matter - Result Question 33
35. Photoelectric emmision occurs only when the incident light has more than a certain minimum
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======= ####35. Photoelectric emmision occurs only when the incident light has more than a certain minimum
c3eec34ec6b1fad69db54a20ad4b2dca40c2aa54 (a) power
(c) intensity
(b) wavelength
(d) frequency
[2011]
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Answer:
Correct Answer: 35. (d)
Solution:
- (d) For occurence of photoelectric effect, the incident light should have frequency more than a certain minimum which is called the threshold frequency $(v_0)$.
We have, $\frac{1}{2} mv^{2}=h v-h v_0$
For photoelectric effect emission $n>n_0$ where $n$ is the frequency of the incident light.
