Q10 of 36 Page 379

A person wants to see the full length image of tall building in a small mirror. Which type of mirror is used by him?

Person will use the convex mirror because it always forms virtual and erect image and has the wider field of view which will help in capturing the whole building.

The figure below shows the image of tall building in convex mirror.



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How can we find the (rough) focal length of a concave mirror?

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A concave mirror of focal length 1.5m forms an image of an object placed at a distance of 40cm. Find the position and nature of the image.

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Why do we not see the actual depth of a lake?

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The refractive indices of water and glass are and respectively. Write the relation and find the value of refractive index of water with respect to glass and glass with respect to water.