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Radiation of wavelength 310 nm is incide...

Radiation of wavelength 310 nm is incidenton a metal surface of work function `1eV`. Find maximum speed of photoelectrons emitted . ( Closed value )

A

`10^(6)m//s`

B

`10^(8)m//s`

C

`10^(7)m//s`

D

`10^(5)m//s`

Text Solution

Verified by Experts

The correct Answer is:
A
`(K.E)_(max)=(hc)/(lambda)-phi, " " (K.E)_(max)=((1240)/(310)-1)eV=3eV`
`3xx1.6xx10^(-19)=1/2mV^(2)(m=9.1xx10^(-31)kg), " " V~~10^(6)m//s`
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