| Assertion (A): Photosensitivity of a material is high if its work function is low. |
| Reason (R): Work function =\[h{{f}_{0}}\], where \[{{f}_{0}}\] is threshold frequency. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is true
Correct Answer: B
Solution :
| Option [b] is correct. |
| Explanation: Work function is less means less energy is required to eject photoelectrons. So, if the work function is less photosensitivity is high. So the assertion is true. |
| Work function is the minimum energy required to eject a photoelectron and Work function =\[h{{f}_{0}}\], where \[{{f}_{0}}\] is threshold frequency. So reason is also true but it does not explain the assertion. |
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