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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 wavelength is nearest

A

`1 : 2`

B

`4 : 1`0

C

`2 : 1`

D

`1 : 4`

Text Solution

Verified by Experts

The correct Answer is:
C
`W_(0) prop (1)/(lambda) rArr (lambda_(1))/( lambda_(2)) = ((W_(0))_(2))/((W_(0))_(1)) = (4.5)/(2.3) = (2)/(1)`
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A2Z-DUAL NATURE OF RADIATION AND MATTER-Section D - Chapter End Test
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