Dual Nature Of Radiation And Matter
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Dual Nature Of Radiation And Matter Ques 31
31. Photoelectric emmision occurs only when the incident light has more than a certain minimum
[2011]
(a) power
(c) intensity
(b) wavelength
(d) frequency
Show Answer
Answer:
Correct Answer: 31.(d)
Solution:
- (d) For occurrence 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.
BETA
