Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-diagram based-Hard-Class 12
Consider a discharge tube filled with gas at low pressure as described. Which of the following best explains the observation of a fluorescent glow when an electric field is applied?
A
Ionization of gas molecules by the electric field.
B
Reflection of light from the electrodes.
C
Absorption of light by the gas particles.
D
Magnetic effects of the current in the tube.
Correct Answer
Option A
Detailed Explanation
The fluorescent glow is due to the ionization of gas molecules when a discharge takes place at low pressure, as described in the NCERT context.
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