What are the implications of observations frequency of incident radi

1.	What are the implications of observations frequency of incident radiation on stopping potential?
Answer» These observations have two implications: (i) The maximum kinetic energy of the photoelectrons varies linearly with the frequency of incident radiation, but is independent of its intensity. (ii) For a frequency n of incident radiation, lower than the cut-off frequency n₀, no photoelectric emission is possible even if the intensity is large. This minimum, cut-off frequency n₀, is called the threshold frequency. It is different for different metals. Different photosensitive materials respond differently to light. Selenium is more sensitive than zinc or copper. The same photosensitive substance gives different response to light of different wavelengths. For example, ultraviolet light gives rise to photoelectric effect in copper while green or red light does not.

What are the implications of observations frequency of incident radiation on stopping potential?

Answer»

These observations have two implications:

(i) The maximum kinetic energy of the photoelectrons varies linearly with the frequency of incident radiation, but is independent of its intensity.

(ii) For a frequency n of incident radiation, lower than the cut-off frequency n₀, no photoelectric emission is possible even if the intensity is large. This minimum, cut-off frequency n₀, is called the threshold frequency. It is different for different metals.

Different photosensitive materials respond differently to light. Selenium is more sensitive than zinc or copper. The same photosensitive substance gives different response to light of different wavelengths. For example, ultraviolet light gives rise to photoelectric effect in copper while green or red light does not.

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