NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Dual Nature of Matter
NEET · Physics · Dual Nature of Matter
Two statements are given below : Statement I : Photosensitivity of...
Two statements are given below :
Statement I : Photosensitivity 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: Photosensitivity refers to how easily electrons can be ejected from a metal when exposed to light. If the metal has a lower work function, less energy is required to release electrons, making it more photosensitive. Thus, Statement I is correct.
- Statement II: The work function ((\phi)) of a metal is indeed given by (\ddot{I} 0=h \hat{I} 1 / 20), where is Planck's constant and (\hat{I}^{1 / 20}) is the threshold frequency. This is based on the photoelectric effect theory. Thus, Statement II is also correct.