The kinetic energy of photoelectrons depends on ...............

The frequency of a light wave is $12 \times 10^{14} \ s^{-1}$. The wave number associated with it is .......

The energy of one mole of photons of radiation of frequency $2 \times 10^{12} \ Hz$ in $J \ mol^{-1}$ is $.....$ (Nearest integer) (Given: $h = 6.626 \times 10^{-34} \ Js$,$N_A = 6.022 \times 10^{23} \ mol^{-1}$)

The photoelectric effect can be caused by which of the following?

Find the wavelength of radiation having frequency $4 \times 10^{11} \ kHz$.

$\alpha$-rays have