Question

The colour of light depends on the gas inside the discharge lamp.

• A. True
• B. False

Answer 1

The correct option is A

True

When a discharge lamp is connected to a source of electricity, the gas in between the electrodes gets ionised due to the applied potential difference.
Ionised atoms move at high speed and collide with unionised atoms among them and excite them to higher energy states. When these excited atoms come
back to their original states for attaining stability, they radiate light. If the gas is different, the colour of light will be different.
Hence, the colour of light depends on the gas inside the discharge lamp.