Question 362: Dual Nature of Matter and Radiation

Question

Light of frequency two times the threshold frequency is incident on photosensitive material. If the incident frequency is made $$\left(\frac{1}{3}ight)^{	ext {rd }}$$ and intensity is doubled, then the photoelectric current will

Accepted Answer

Initial frequency $$v=2 v_0$$
Final frequency $$v^{\prime}=\frac{2 v_0}{3}$$
$$v^{\prime}$$ is less than the threshold frequency $$v_0$$
Hence no photoelectrons will be emitted and photoelectric current will be zero.

Answer

increase

Answer

decrease

Answer

be zero

Answer

be halved

Dual Nature of Matter and Radiation

Light of frequency two times the threshold frequency is incident on photosensitive material. If the incident frequency is made $\left(\frac{1}{3}\right)^{\text {rd }}$ and intensity is doubled, then the photoelectric current will

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