MCQ
light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. what will be photo electric current if fre quency is halved and intensity is doubled:
- A4 times
- B1/4 times
- ✓zero
- D2 times
✓
Answer
Correct option: C.
zero
(C) 18 pm
The new frequency of light is (1.5/2) =0.75 times the threshold frequency and which is less than it. hence no emission will take place and photoelectric current will be zero.
The new frequency of light is (1.5/2) =0.75 times the threshold frequency and which is less than it. hence no emission will take place and photoelectric current will be zero.
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