18.3k views
2 votes
Statement-1 : Photoelectric saturation current increases with the increases in frequency of incident light.

Statement-2 : Energy of incident photons increases with increases in frequency and as a result photoelectric current increases.

A. Statement-1 is false,Statement-2 is true
B. Statement-1 is true,Statement-2 is true,Statement-2 is a correct explanation for Statement-1
C. Statement-1 is true,Statement-2 is true,Statement-2 is not correct explanation for Statement-1
D. both Statement-1 and Statement-2 are false

1 Answer

3 votes

Final answer:

In the context of the photoelectric effect, increasing the frequency of incident light increases the kinetic energy of the ejected electrons but does not directly increase the photoelectric saturation current unless light intensity also increases. Therefore, Statement-1 is false, while Statement-2 is true.

Step-by-step explanation:

The question focuses on the photoelectric effect and the relationship between the photoelectric saturation current and the frequency of incident light. Regarding Statement-1, if the intensity is held constant but the frequency of the incident radiation is increased beyond the threshold frequency, then the kinetic energy of the photoelectrons increases. However, this does not affect the photoelectric saturation current, as the current is dependent on the number of photoelectrons ejected which is a function of light intensity and not frequency. Therefore, Statement-1 is false.

Statement-2 is indeed true as per the equation E = hv, where E is the energy of the photons, h is Planck's constant, and v is the frequency of the light. As the frequency v increases, so does the energy E of the incident photons. This increased energy translates into increased kinetic energy of photoelectrons emitted above the threshold frequency, but again, not directly into an increase in the photoelectric current unless the light intensity also increases.

The answer to the question is therefore Option A: Statement-1 is false, and Statement-2 is true.

User Yin Yang
by
8.6k points