A monochromatic neon lamp with wavelength of 
illuminates a photo-sensitive material which has a stopping voltage of 
. What will be the stopping voltage if the source light is changed with another source of wavelength of 
?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Given wavelength of neon lemp 
Stopping potential 
.
From the Einstein's photoelectric equation
For second case wavelength 
stlopping potential 
.
Subtrating equation (i) from (ii) we get
volts
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