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Sodium and copper have work functions 2....

Sodium and copper have work functions 2.3 eV and 4.5 eV respectively. Then the ratio of the threshold wavelengths is nearest to

A

Electrons can be ejected from A and C only

B

Electrons can be ejected from A and B only

C

Electrons can be ejected from A,B and C

D

None of the above

Text Solution

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The correct Answer is:
B
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