Question

A photos of wavelength 1240'A strikes a metal surface ejected a photo electron with kinetic
energy (E.). If work function associated with metal is 4 eV. The value of E is
1) 578 KJ/mole
2) 6eV/ mole
3) 6 KJ/mole
4) 6 K.Cal mole​

Answer 1

Answer:

2 option is correct. follow me

Answer 2

Answer:

option 2 is the correct answer