NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Atomic Physics
NEET · Physics · Atomic Physics
Two statements are given below : Statement I : Photo sensitivity of...
Two statements are given below :
Statement I : Photo sensitivity of a metal is high, if its work function is low.
Statement II : Work function for a metal is given by (\mathrm{hv}_0), where (\mathrm{v}_{\mathrm{o}}) is threshold frequency. Considering the above, choose the appropriate answer from the options given below :
Options
- ABoth statement I and statement II are correct.
- BStatement I is correct and statement II is incorrect.
- CStatement I is incorrect and statement II is correct.
- DBoth statements I and statements II are incorrect.
Correct answer
A. Both statement I and statement II are correct.
Step-by-step solution
- Statement I: The photo sensitivity of a metal refers to how easily it emits photo electrons when exposed to light. If the work function of a metal is low, less energy is required to eject electrons. Therefore, metals with a low work function are more photosensitive. Hence, Statement I is correct.
- Statement II: The work function ((\phi)) of a metal is related to the threshold frequency () by the equation (\phi=h v_0), where is Planck's constant. The threshold frequency is the minimum frequency required to eject electrons from the metal. Hence, Statement II is also correct.