1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

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

A
be reduced by a factor of 2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
be reduced by a factor of 4
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
be reduced by a factor of 8
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
be reduced by a factor of 16
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is B be reduced by a factor of 41∝1r2l1l2=(r1)2(r2)2Given,r1=0.5m,r2=1.0mtherefore,l2l1=(0.5)2(1)2=14Now, since number of photoelectric emitted per second is directly pr optional intensity, so number of electron emitted would decreased by factor of 4.

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Cathode Ray Experiment
CHEMISTRY
Watch in App
Explore more
Join BYJU'S Learning Program