In a photoelectric experiment, kinetic energy of photoelectrons was plotted aganist the frequency of incident radiation (v), as shown in figure. Which of the following statements is correct?
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a
The threshold frequency is v1
b
The slope of this line is equal to Planck's constant
c
As the frequency of incident radiation increase kinetic energy of photoelectrons decreases
d
It is impossible to obtain such a graph.
answer is B.
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Detailed Solution
KE = hv- hvºKE(y) = hv - hvºA straight line graph with a positive slope (h) and a negative y - intercept (-hvº).