SATHEE: Dual Nature of Radiation and Matter

Dual Nature of Radiation and Matter - Result Question 33

####35. Photoelectric emmision occurs only when the incident light has more than a certain minimum

(a) power

(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, $\frac{1}{2} m v^{2} = h v - h v_{0}$

For photoelectric effect emission $n > n_{0}$ where $n$ is the frequency of the incident light.

Dual Nature of Radiation and Matter - Result Question 32

Dual Nature of Radiation and Matter - Result Question 34

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Dual Nature of Radiation and Matter - Result Question 33

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