Optics/Evidence for light as a stream of particles

Light is the thing we define as the visible part of the spectrum of electromagnetic waves.

With the help of the impulse of a particle and the impulse of a(n) (electromagnetic) wave, evidence for light being a stream of particles and vice versa can be found.

The impulse/momentum of a "normal particle" is defined as:

${\displaystyle p({\text{particle}})=mv}$

A scientist named Louis de Broglie found that the wavelength of an electromagnetic wave can be approached with planck's constant and the impulse of the waves. The formula looks like this:

${\displaystyle \lambda ={h \over p}}$

or

${\displaystyle p({\text{EM}})={h \over \lambda }}$

Applying ${\displaystyle p=mv}$, we get:

${\displaystyle \lambda ={h \over {mv}}}$

Rearranging the above equation, we have:

${\displaystyle {h \over \lambda }=mv}$

Which is equivalent to:

${\displaystyle p({\text{EM}})=p({\text{particle}})}$

Therefore, we conclude that an electromagnetic wave is just a stream of particles and vice-versa.