Question

Light of frequency 3 times the threshold frequency is incident on photosensitive material. If the frequency is half and intensity is double . The photoelectric current becomes _____________

Answer 1

1. Photoelectric current is directly proportional to the intensity of the light it will not vary with frequency.
2. Only the condition is it must have a threshold frequency. It has a frequency of 3 times greater than its threshold frequency initially so when it becomes half it is also greater than the threshold frequency.
3. So here the intensity becomes double the photoelectric current becomes double.​