Question

Emission or Absorption spectra experiment is performed with

• A. High pressure gas
• B. Solid Metals
• C. Non metals
• D. Low pressure (Rarified) gas

Answer 1

The correct option is D

Low pressure (Rarified) gas

Remember we told you always that the spectrum was observed when we put a rarified gas in the chamber and did experiments with it.

Also if you look closely, an incandescent bulb is made of a tungsten filament which is heated to radiate light.

This light when passed through a prism to separate into constituent components gives all wavelengths and thus forms a continuous spectrum.

If we try the same with a fluorescent bulb which has a low pressure gas then we see discrete spectrum of certain wavelengths.