Let's solve each question based on the principles of
refraction of light and the diagram provided.
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1. When the light travels from less dense medium (air) to denser medium (glass), it bends _________ normal.
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Answer: towards
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Explanation: When light moves from a rarer medium (like air) to a denser medium (like glass), it slows down and bends
toward the normal (the perpendicular line at the interface).
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2. i is the ____________ while r is the ____________.
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Answer:
- $ i $ is the
angle of incidence
- $ r $ is the
angle of refraction
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Explanation:
- The
angle of incidence ($i$) is the angle between the incident ray and the normal.
- The
angle of refraction ($r$) is the angle between the refracted ray and the normal.
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3. As the light propagates into a denser medium, the value of $ r $ is _______ than the value of $ i $. The speed of light is _______ when it enters the denser medium.
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Answer:
- The value of $ r $ is
less than the value of $ i $.
- The speed of light is
slower when it enters the denser medium.
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Explanation:
- Since light bends toward the normal in a denser medium, the angle of refraction ($r$) is smaller than the angle of incidence ($i$).
- Light travels slower in denser media (like glass) compared to air.
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4. The speed of light is _______ as it travels out from the glass.
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Answer: increases
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Explanation:
- When light exits from glass (denser) back into air (rarer), it speeds up. So, the speed of light
increases.
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5. When the light travels from ______ medium (glass) to ______ medium (air), it bends _______ normal.
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Answer:
- From
denser medium (glass) to
less dense medium (air), it bends
away from normal.
-
Explanation:
- Light speeds up when going from glass to air and bends
away from the normal.
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6. The bending of light is known as ____________________.
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Answer: Refraction
-
Explanation:
- The phenomenon where light changes direction when passing from one medium to another due to a change in speed is called
refraction.
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✔ Final Answers:
1.
towards
2.
angle of incidence,
angle of refraction
3.
less than,
slower
4.
increases
5.
denser,
less dense,
away from
6.
refraction
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This completes the solution with clear explanations based on the laws of refraction and the behavior of light in different media.
Parent Tip: Review the logic above to help your child master the concept of refraction worksheet.
