EASY
7th CBSE
IMPORTANT
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We can get a concave mirror by polishing a spherical surface on its outside.

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Important Questions on Light

EASY
7th CBSE
IMPORTANT
The Science Hub>Chapter 15 - Light>Exercises>Q 1
Light is not reflected back equally by all reflecting surfaces.
EASY
7th CBSE
IMPORTANT
The Science Hub>Chapter 15 - Light>Exercises>Q 1
The spectrum has nine colours.
EASY
7th CBSE
IMPORTANT
The Science Hub>Chapter 15 - Light>Exercises>Q 1
Light travels in a straight line.
EASY
7th CBSE
IMPORTANT
The Science Hub>Chapter 15 - Light>Exercises>Q 1

Give reasons for the following.

Old people wear spectacles having convex lenses.

EASY
7th CBSE
IMPORTANT
The Science Hub>Chapter 15 - Light>Exercises>Q 1

Give reasons for the following.

 A concave mirror is used as a dentist's mirror.

EASY
7th CBSE
IMPORTANT
The Science Hub>Chapter 15 - Light>Exercises>Q 1

Give reasons for the following. 

We cannot see a light source through a bent tube.

MEDIUM
7th CBSE
IMPORTANT
The Science Hub>Chapter 15 - Light>Exercises>Q 2
Differentiate between concave and convex mirror.
MEDIUM
7th CBSE
IMPORTANT
The Science Hub>Chapter 15 - Light>Exercises>Q 2
Differentiate between real and virtual image.