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If the threshold frequency for photoemi...

If the threshold frequency for photoemission on a metal corresponds to a wavelength 5000 Å, then its work function is

A

10 J

B

`16xx10^(-14)`J

C

`4xx10^(-10)`J

D

`4xx10^(-19)`J

Text Solution

Verified by Experts

The correct Answer is:
D
`W_(0)=(hc)/(lambda_(0))=(6.66xx10^(-34)xx3xx10^(8))/(5xx10^(-7))`
`W_(0)=4xx10^(-19)J`
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