Question

5. The minimum frequency is
(a) 3
(b) 6
(c) 9
(d) 12
​

Answer 1

Answer:

Thershold frequency, v0 is the minimum frequency which a photon must possess to eject an electron from a metal. It is different for different metals.

Answer 2

Answer:

$\large\mathbf\green{A \: N \: S \: W \: E \: R \:}$

$\longrightarrow$ The minimum frequency is 3.