The velocity of a photon is proportional to (where $\nu$ is frequency):

Which of the following has a mass closest in value to that of the positron? $(1\;a.m.u = 931\;MeV)$

If a photon has velocity $c$ and frequency $\nu$,then which of the following represents its wavelength?

An electric bulb of $100 \ W$ power emits photons of wavelength $410 \ nm$ per second. The number of photons emitted per second is: $(h = 6.63 \times 10^{-34} \ J \cdot s, c = 3 \times 10^8 \ m/s)$

The particle having zero rest mass is

$A$ photon has a wavelength of $3 \,nm$. Its momentum and energy, respectively, will be:
$[h = 6.63 \times 10^{-34} \,Js, c = 3 \times 10^8 \,m/s]$