The momentum of a photon of energy $h\nu$ will be:

Which of the following will have the least value of $\frac{q}{m}$?

$n$ photons of wavelength $\lambda$ are absorbed by a black body of mass $m$. The momentum gained by the body is

The number of photons emitted from a photocell by a source placed at a distance of $0.5 \ m$ is how many times the number of photons emitted by the same source placed at a distance of $1 \ m$?

If the wavelength of an $X-ray$ is $0.010 \ \mathring A$,what is its momentum?

The momentum of a photon with energy $20 \, eV$ is