Question

1
33. The maximum kinetic energy of
A photoelectrons ejected from a metal
when it is irradiated with a radiation of
frequency 5 1014 s-1 is 7.5 . 10-20J.
The threshold frequency of the metal is
(a) 4 . 1014 s-1
(b) 3. 1014 s-1
(C) 1 · 1015 s-1
(d) 5 - 1015 s-1​

Answer 1

Answer:

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