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10th Andhra Pradesh Board
IMPORTANT
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Is the point 2F and centre of curvature the same. Explain.

Important Questions on Refraction of Light at Curved Surfaces

EASY
10th Andhra Pradesh Board
IMPORTANT

A student did an experiment with a convex lens. He put an object at different distances 25 cm, 30 cm, 40 cm, 60 cm and 120 cm from the lens. In each case he measured the distance of the image from the lens. His results were 100 cm, 24 cm, 60 cm, 30 cm and 40 cm, respectively. Unfortunately his results are written in wrong order.

Which of the object distances gives the biggest image?

EASY
10th Andhra Pradesh Board
IMPORTANT
Which causes more bending (or more refraction) of light rays passing through it: a convex lens of long focal length or a convex lens of short focal length?
MEDIUM
10th Andhra Pradesh Board
IMPORTANT
An object is placed at a distance of 30 cm from a convex lens whose focal length is 20 cm. Find the distance of the image.
EASY
10th Andhra Pradesh Board
IMPORTANT
 Write the relation between u, v and f of a thin lens.
MEDIUM
10th Andhra Pradesh Board
IMPORTANT
An object is placed at a distance of 10 cm from a concave lens of focal length 20 cm. Find the position of the image and discuss its nature.
MEDIUM
10th Andhra Pradesh Board
IMPORTANT
An object is placed before a concave lens of focal length 12 cm. The size of the image formed by the lens is half the size of the object. Calculate the distance of the object from the lens.
HARD
10th Andhra Pradesh Board
IMPORTANT
An object is placed 60 cm from a screen. Where should you place a convex lens of focal length 15 cm to get the image of the object on the screen?
EASY
10th Andhra Pradesh Board
IMPORTANT
An object is kept at a distance of 36 cm from a convex lens of focal length 12 cm. A plane mirror is placed at a distance of 48 cm on the other side of the lens, as shown in the figure. The ray diagram is also shown. The eye receives the rays after they are reflected from the plane mirror. The eye sees the final image behind the plane mirror. How far behind the plane mirror does this image form?

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