Question

Which of these statements is true regarding photoelectric emission ?

• A. Number of photoelectrons ejected per second is directly proportional to intensity of incident light provided the frequency of incident light is greater than threshold frequency
• B. Number of photoelectrons ejected per second is inversely proportional to intensity of incident light provided the frequency of incident light is greater than threshold frequency
• C. Number of photoelectrons ejected per second is directly proportional to intensity of incident light provided the frequency of incident light is smaller than threshold frequency
• D. Number of photoelectrons ejected per second is inversely proportional to intensity of incident light provided the frequency of incident light is smaller than threshold frequency

Answer 1

Answer: (A)

In a photoelectric emission, if frequency of incident photon is greater than threshold frequency then number of photoelectrons ejected per second is directly proportional to intensity of incident light.