EASY
7th CBSE
IMPORTANT
Earn 100

Which mirror is used as a dentist’s mirror?

Important Questions on Light

EASY
7th CBSE
IMPORTANT
Which mirror is used as a side-view mirror in automobiles?
EASY
7th CBSE
IMPORTANT
A lens is thicker at the edges and thinner in the middle. Can it burn pieces of paper by focussing sunlight?
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7th CBSE
IMPORTANT
A lens always forms a diminished, erect and virtual image. Identify the nature of the lens.
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7th CBSE
IMPORTANT
A lens forms a magnified, erect and virtual image when an object is placed very close to it. Identify the lens.
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7th CBSE
IMPORTANT
Which lens is used for correcting the long-sightedness?
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7th CBSE
IMPORTANT

Each lens has a point, a ray passing through it goes without deviation. What is the name of that point and where is it located?

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7th CBSE
IMPORTANT
Name a triangular pyramidal piece of glass that splits white light into lights of seven colours.
EASY
7th CBSE
IMPORTANT

Which of the seven colours deviates (a) the least and (b) the most, when a ray of white light travels through a prism?