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Mention Three Properties of Infra Red Radiations Similar to the Visible Light. Give Two Such Properties of Infrared Radiations Which Are Not True for Visible Light. - Physics

Short Note
Mention three properties of infra red radiations similar to the visible light. Give two such properties of infrared radiations which are not true for visible light.
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Solution

Three properties of infrared radiations similar to the visible light:
1. They travel in straight lines as light does, with a speed equal to 3 x 108 m/s in vacuum.
2. They obey laws of reflection and refraction.
3. They are unaffected by electric and magnetic fields.
Two properties of infrared radiation different from the visible light:
1. They are absorbed by glass, but they are not absorbed by rock-salt.
2. They are detected by their heating property using a thermopile or a blackened bulb thermometer.

Concept: Concept of Spectrum
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APPEARS IN

Frank ICSE Class 10 Physics Part 2
Chapter 2 Light
Exercise | Q 2 | Page 118
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