The wavelength of blue light is $480 \ nm$. What is the frequency of this light?

$A$ metal surface is exposed to solar radiation.

The greater the energy of a photon,the

Work functions of four metals $M_1, M_2, M_3$ and $M_4$ are $4.8, 4.3, 4.75$ and $3.75 \ eV$ respectively. The metals which do not show photoelectric effect when light of wavelength $310 \ nm$ falls on the metals are

$750$ waves of an energy radiation pass in one minute from a point. What will be the wavelength of the radiation? (Assume the speed of radiation is $3 \times 10^8 \ m/s$)

What is the wavelength for a wave having frequency $50 \ Hz$?