Electromagnetic radiation with maximum wavelength is

In the visible spectrum,which color,violet or red,undergoes greater refraction? Why?

$750$ 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 $3 \times 10^8 \ m/s$)

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

$A$ particular radio station broadcasts at a frequency of $1120 \, kHz$. Another radio station broadcasts at a frequency of $98.7 \, MHz$. What will be the wavelength of the radiation for each station?

Splitting of spectral lines under the influence of a magnetic field is called: