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

Give the characteristics of electromagnetic radiation. Give the relation between them.

In the hydrogen spectrum,the different lines of the Lyman series are present in the:

Calculate the wavelength for the emission of a photon having a wave number of $11516 \ cm^{-1}$. (in $nm$)

The energy of one mole of photons of radiation of wavelength $300 \ nm$ is ...... $kJ \ mol^{-1}$. (Given: $h = 6.63 \times 10^{-34} \ J \ s, N_A = 6.02 \times 10^{23} \ mol^{-1}, c = 3 \times 10^8 \ m \ s^{-1}$)

Calculate the frequency if the wavelength is $750 \ nm$.