" 7.If the wavelength of an electomagnetic radiation is "2000^(@)A" .What is the energy in ergs? "

If the wavelength of an electromagnetic radiation is 2000 A. what is its energy in ergs?

If the wavelength of an electromagnetic radiation is 2000 A. what is its energy in ergs?

The wavelength of an electromagnetic radiation is lamda . What is the energy of a photon of this radiation?

If the wavelength of electromagnetic radiation is doubled, what happens to the energy of photon ?