The wavelength of electromagnetic radiation is doubled. What will happen to the energy of the photons of the new radiation ?

Options

A. E is doubled
B. E becomes four times
C. E is halved
D. The energy will be `1//4^(th)` of the original energy

Answer

C

Explanation

`E=hv=(hC)/(lambda)`
When `lambda` is doubled, E is halved.