Question

The work function of a metal is 1.55 electron volt. A photon of wavelength 300 NM strikes on metal surface. Calculate the kinetic energy of photoelectron. One electron volt is equals to 1.6 into 10 raise to power minus 19 Joule,Planck's constant h is equals to 6.63 into 10 raise to power minus 34 joule second.

Answer 1

Answer:

You can do it like this:

Explanation:

To find the energy of a photon you use the Planck Expression:

E

=

h

f

h

is the Planck Constant which =

6.63

×

10

−

34

x

J

.

s

f

is the frequency

This becomes:

E

=

h

c

λ

c

is the speed of light =

3.00

×

10

8

x

m/s

λ

is the wavelength