Photoelectric threshold of silver is `lambda = 2600 A^@` is incident on silver surface. What is the value of work function?

Explanation

Here `lambda_0 = 3800 A^@`
work function `phi`
or w= `hv_0 = (hc)/lambda_0`
= `(6.63 xx 10^-34 xx 3 xx 10^8)/(3800 xx 10^-10)= 5.23 xx 10^-19 J (3.2 e V)`