#### If a source of power 4 kW produces 1020 photons/second, the radiation belongs to a part of the spectrum called Option 1) Option 2) Option 3) ultraviolet rays Option 4) microwaves

As we learnt in

Energy of a photon -

- wherein

If wavelength of photon is  & n is the number of photon emitted per second then

This wavelength represent X-rays hence correct answer is 2

Option 1)

This is an incorrect option.

Option 2)

This is the correct option.

Option 3)

ultraviolet rays

This is an incorrect option.

Option 4)

microwaves

This is an incorrect option.