In the photoelectric experiment, if we use a monochromatic light, the 
curve is as shown. If work function of the metal is 2 eV, estimate the power of light used. (Assume efficiency of photoemission 
, i.e. number of photoelectrons emitted are 
of number of photons incident on metal.)
Text Solution
Verified by ExpertsThe correct answer is:
C
Given: 
,
From figure, 
We know, 
…… (i)
…… (ii)
Where 
and 
are the number of photons incident and number of photoelectrons emitted, respectively.
Photocurrent, 
Now, 
Eq. (i) becomes
Equation (ii) becomes
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems