Question

Which of following gives monochromatic light? (a) Sodium lamp (b) Mercury lamp (c) Spark lamp (d) All of the above​

Answer 1

Answer:

sodium gives monochromatic light

Explanation:

Answer 2

The correct option is a)  Sodium lamp.

A sodium lamp gives monochromatic light.

• In the sodium lamp, there is a process of heating the sodium and vaporizing. Then the sodium ionizes to produce monochromatic yellow light.
• Sodium is light intensity therefore, it takes a long lamp tube to produce the monochromatic light.
• The tube is of u shape.
• It has better efficiency than mercury lamps.
• We can see wide use of sodium lamps in houses especially used as study lamps.