Question

Light from a sodium lamp is passed through cold sodium vapours, the spectrum of transmitted light consists of what spectral lines?

Answer 1

Light:

1. Light is defined as a type of electromagnetic radiation with wavelengths ranging between $380nm$ and $750nm$, which are visible to the human eye.
2. It is a source of illumination, either a natural one like the sun or an artificial one like a lamp.
3. It is made of particles called photons. These are bundles of electromagnetic fields that carry some amount of energy.

Explanation:

1. The refractive list of numerous materials e.g. glass fluctuates with the frequency or shade of the light utilized, a marvel known as scattering.
2. This phenomenon makes light of various tones be refracted contrastingly and leave the crystal at many points, giving an impression of a rainbow.
3. Kirchhoff’s law states that a substance in the unexcited state will absorb these wavelengths which it emits in de-excitation.
4. This means there will be no spectral lines in this case.

Thus, no spectral features.