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NEETPhysicsDual Nature of Matter

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 ( hv ₀ ), where ( v _ o ) is threshold frequency. Considering the above, choose the appropriate answer from the options given below :

Options

  1. ABoth statement I and statement II are correct.
  2. BStatement I is correct and statement II is incorrect.
  3. CStatement I is incorrect and statement II is correct.
  4. 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 ( ( )) of a metal is indeed given by ( I 0=h I 1 / 20 ), where (h ) is Planck's constant and ( I ^ 1 / 20 ) is the threshold frequency. This is based on the photoelectric effect theory. Thus, Statement II is also correct.

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