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10th Manipur Board
IMPORTANT
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You are given three mirrors- convex, concave and plane appearing identical. How can you identify them without touching?

Important Questions on Light

MEDIUM
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 11 - Light>EXERCISE>Q 8
Why do we prefer a convex mirror as a rear-view mirror in vehicles?
EASY
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 11 - Light>EXERCISE>Q 9
The radius of curvature of a spherical mirror is 40 cm. What is its focal length in centimetres?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 11 - Light>EXERCISE>Q 10
A concave mirror produces three times magnified real image of an object placed in front of it. Where is the image formed?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 11 - Light>EXERCISE>Q 11
You are given a concave mirror, a scale and a screen. How will you determine the height of a tree?
MEDIUM
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 11 - Light>EXERCISE>Q 12
A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 11 - Light>EXERCISE>Q 13
Light enters from air to glass having refractive index 1.5. What is the speed of light (in m s-1) in the glass? (The speed of light in vacuum is 3×108 m s-1).
MEDIUM
10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 11 - Light>EXERCISE>Q 14
What is refraction of light? Illustrate with example.
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 11 - Light>EXERCISE>Q 15
What is refractive index of a medium?