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Science [4 Mark Questions]

PHYSICS CH6 Light · Tamil Nadu Board STD 9 (Tamil - English Medium). 2 questions.

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[4 Mark Questions]

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2 questions · timed · auto-graded

Question 14 Marks
Higher Order Thinking Skills.

When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?

Answer

When a ray of light travels from rare (air) medium to dense [glass] medium, light ray moves towards the normal.
∴ Angle of refraction < Angle of incidence.

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Question 24 Marks
Higher Order Thinking Skills. 

Light ray emerges from water into air. Draw a ray diagram indicating the change in its path in water.

Answer

When a ray of light travels from dense medium to rarer medium [from water medium to air medium], light ray moves away from the normal.
∴ Angle of incidence < Angle of refraction.
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[4 Mark Questions] - Science STD 9 Questions - Vidyadip