The graph between 
and stopping potential 
of three inctals hvaing work functions 
and 
in an experiment of photo-clectric effect is plotted as shown in the figure. Which of the following statement(s) is/are correct? [Here 
is the wavelength of the incident ray]
is directly proportional to hc/e, where 
is Planck's constant and 
is the speed of light.
Text Solution
Verified by ExpertsC
For plate 1:
Plate 2
Plate 3
For plate 2 , threshold wavelength
For plate 3 , threshold wavelength
since violet colour light 
is 
, so
for plate 2
so, violet colour light will eject photo-electrons from plate 2 and not plate 3 .
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