Question

The energy required to remove an electron from the surface of sodium metal is 3.3ev3.3ev. What is the longest wavelength of radiation with which it can show photoelectric effect?
use h=6.6×10−34j.S

Answer 1

Explanation:

Given The energy required to remove an electron from the surface of sodium metal is 3.3 e V What is the longest wavelength of radiation with which it can show photoelectric effect?

We know that E = h c / λ

So λ = h c / E

Or λ = 6.6 x 10^-34 Js x 3 x 10^8 / 3.3 x 1.6 x 10^-19

So λ = 19.8 x 10 ^-7 / 5.28

Or λ = 3.75 x 10^-7 m

Or λ = 3750 x 10^-10 m  

Or λ = 3750 Å

Reference link will be

https://brainly.in/question/6246009