How many photons does a green (532nm) 1mw laser pointer emit? can we still treat the light as a continuous electromagnetic wave in this case? (2 pts)

photons/s

Yes,we can treat the light as a continuous electromagnetic wave in this case.

Explanation:

We are given that  

Wavelength of photon=

1nm=

Power of photon=1mW=

We have to find the number of photons emit from laser.

In 1 s, photon emit energy=0.0010 J

We know that

Where c

Energy of photon

=Wavelength of light

Substitute the values then, we get

photons/s

Visible light is EM wave.

Range of wavelength of visible light =400nm- 700 nm

Green color lies in visible region because its wavelength lies in 400nm-700 nm.

Therefore, we can treat the light as a continuous electromagnetic wave in this case.