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Work function of metal is 1.6 eV for whi...

Work function of metal is 1.6 eV for which maximum wavelength photoelectric emission can be obtained ?
`[h=6.6xx10^(-34)JS,c=3xx10^(8)m//s]eV=1.6xx10^(-19) J]`

A

5800 Å

B

3867Å

C

29000Å

D

7734Å

Text Solution

Verified by Experts

The correct Answer is:
D
`phi=hf=(hc)/(f)`
`therefore lambda =(hc)/(phi)=(6.6xx10^(-34)xx3xx10^(8))/(1.6xx1.6xx10^(-19))`
`therefore lambda=7.734375xx10^(-7)` m
`therefore lambda~~7734xx10^(-10)m`
`therefore lambda~~7734Å`
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