Question 263: Dual Nature of Matter and Radiation

Question

Light of incident frequency 3 times the threshold frequency is incident on a photosensitive material. If the incident frequency is made $\left(\frac{1}{4}ight)^{	ext {th }}$ and intensity is tripled then the photoelectric current will

Accepted Answer

Let $v_0$ be the threshold frequency,
$	herefore \quad$ Incident frequency $(v)=3 v_0\,\,\,\,	ext { ...(given) }$
The frequency is made $\left(\frac{1}{4}ight)^{	ext {th }}$,
$$ 	herefore \quad v^{\prime}=\frac{3 v_0}{4}=0.75 v_0 $$
As $0.75 v_0
As the new frequency is less than threshold frequency, no current will flow.

Answer

increase.

Answer

decrease.

Answer

be $\left(\frac{1}{3}ight)^{	ext {rd }}$

Answer

be zero.

Dual Nature of Matter and Radiation

Light of incident frequency 3 times the threshold frequency is incident on a photosensitive material. If the incident frequency is made \left(\frac{1}{4}\right)^{\text {th }} and intensity is tripled then the photoelectric current will

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