Light of wavelength 
from a sodium lamp falls on a photo cell and causes the emission of photo electrons for which the stopping potential is 0.5 V. With light of wavelength 
from a sodium lamp, the stopping potential is 1.5 V. With this data the value of 
is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Here, 
…… ..(i)
…… ..(ii)
From eq (i) & (ii)
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