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A : Every metal has a definite work fun...

A : Every metal has a definite work function , still all photoelectrons do not come out with the same energy it incident radiation is monochromatic .
R : Work function is the minimum energy required for the electron in the highest level of conduction band to get out of the metal . Not all electrons in the metal belong to this level rather they occupy a continuous band of levels .

A

If both Assertion & Reason are ture and the reason is the correct explanation of the assertion , then mark (1) .

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion , then mark (2) .

C

If Assertion is true statement but Reason is false , then mark (3)

D

If both Assertion and Reason are false statements , then mark (4) .

Text Solution

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Knowledge Check

  • The minimum energy required for the electron emission from the metal surface can be supplied to the free electrons by which of the following physical processes ?

    A
    Thermionic emission
    B
    Field emission
    C
    photoelectric emission
    D
    All of these

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