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

Chlorophyll in green plants absorbs light of frequency $4.620 \times 10^{14} \ Hz$. Find the wavelength and the region in the electromagnetic spectrum.

The greater the energy of a photon,the

Which characteristics of electromagnetic radiation can be explained by its wave nature and particle nature,respectively?

What is the ratio of the energy of photons having wavelengths $2000 \ \mathring{A}$ and $4000 \ \mathring{A}$?

Electromagnetic radiation with maximum wavelength is