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When light of wavelength 3000 Å falls on...

When light of wavelength 3000 Å falls on a photosensitive surface (A) photoelectrons are emitted. However, for another photoemitter (B), light of wavelength 6000 Å is required for the emission of photoelectrons. What is the ratio of the work functions of A and B ?

A

`1:1`

B

`1:2`

C

`2:1`

D

`4:1`

Text Solution

Verified by Experts

The correct Answer is:
C
`W_(0)=(hv)/(lambda_(0)):.(W_(1))/(W_(2))=(lambda_(2))/(lambda_(1))=2/1`
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MARVEL PUBLICATION-ELECTRONS AND PHOTONS -TEST YOUR GRASP - 17
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