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Assertion (A) : When ultraviolet light is incident on a photocell, its stopping potential is V 0 and the maximum kinetic energy of the photoelectrons is Kmax. When the ultraviolet light is replaced by infrared light, both V 0 and Kmax increase. Reason (R) : Photoelectrons are emitted with speeds ranging from zero to a maximum value.
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Both (A) and (R) are true and (R) is the correct explanation of (A). Both (A) and (R) are true but(R) is NOT the correct explanation of (A). (A) is true but (R) is false. (A) is false but (R) is true. |
(A) is false but (R) is true. |
The kinetic energy of photoelectrons in case of infrared rays will be less than that in case of UV rays. This is because frequency of IR-Rays is less than that of UV-Rays.
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