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The threshold frequency for photoelectri...

The threshold frequency for photoelectric effect on sodiune corresponds to a wavelength of 5000 `Å`. Its function is

A

`4 xx 10^(-19)` J

B

1 J

C

`2 xx 10^(-19)` J

D

`3 xx 10^(-19)` J

Text Solution

Verified by Experts

The correct Answer is:
A
`W_(0) = (hc)/(lambda_(0)) = (6.63 xx 10^(-34) xx 3 xx 10^(8))/(5000 xx 10^(-10)) J = 4 xx 10^(-19)J`
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