Question

. The threshold wavelength for a metal is 5000A0. Find the kinetic energy of the electron emitted from it by radiation of wavelength 3000A0.​

Answer 1

Answer:

K

max

=

λ

hc

−

λ

0

hc

=

4×10

−7

20×10

−26

−

5×10

−7

20×10

−26

= 20×10

−19

(

4

1

−

5

1

) J

=10

−19

J=

1.6×10

−19

10

−19

eV=0.62eV

I think this is the answer

If this is the answer please mark me as brainly