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A 5 watt source emits monochromatic ligh...

A 5 watt source emits monochromatic light of wavelength 5000 Å. When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1.0m, the number of photo electrons liberated will :

A

Be raduced by a factor of 2

B

Be reduced by a factor of 4

C

Be reduced by a factor of 8

D

Bereduced by a factor of 16

Text Solution

Verified by Experts

The correct Answer is:
B
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