Sodium and copper have work functions `2.3 eV and 4.5 eV` respectively . Then the ratio of the wavelength is nearest

Sodium and copper have work functions 2.3 eV and 4.6 eV respectively . Then the ratio of threshold wavelengths are respectively.

Sodium and copper have work functions of 2.3 eV and 4.5 eV. The ratio of their corresponding threshold wavelengths will be approximately equal to

Two metals A and B have work function 2 eV and 4 eV , respectively . Which metal has a lower threshold wavelength for photoelectric effect ?

Two metals a and b have work function 5 eV and 7 eV , respectively . Which metal has a lower threshold wavelength ?

A metal surface is illuminated by the protons of energy 5 eV and 2.5 eV respectively . The ratio of their wavelength is

Two metals A and B have work functions 4 eV and 10 eV respectively. Which metal has higher threshold wavelength?

The work functions of potassium and sodium are 4.5 eV and 2.3 eV respectively. The approximate ratio of their threshold wavelength will be -