Question

If the wavelength of light is 3000 angstrom incident on sodium work function 4.13.What is energy

Answer 1

Explanation:

incident wavelength=3×10^-7m

W°=4.13 V

K.E= hc/wavelength - W°

=6.64×10^-34 × 3×10^8 /3×10^-7 - 4.13

K.E= 6.64 ×10^-19 - 4.13

K.E= 2.51×10^-19