Assertion : A tube light emits white light.
Reason : Emission of light in a tube takes place at a very high temperature.

Options

A. If the both assertion and reason are true and the reason is the correct explanation of the assertion
B. If both assertion and reason are true and the reason is not the correct explanation of the assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false statements.

Answer

C

Explanation

The tube light is nothing but a gas discharge tube, which can emit light of different colours. This colour depends mainly upon the nature of the gas inside the tube and the nature of the glass. For neon gas the colour is bright red and for `CO_2` it is bluish. Again the flourecent glow looks yellowish green for soda glass. So it is the nature of the glass and the gas inside the tube which determines the colour of the flourescent glow. As agron is filled inside a tube light, the colour of the light is white.