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Image Formation by Convex Lens

A biconvex le...

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A biconvex lens of refractive index 1.5 has a focal length of 10cm. Calculate the radius of curvature. Find the position and nature of the image of an object held at a distance of 10cm from the lens

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Q. A biconvex lens has radii of curvature of two faces 0.1 m and 0.12 respectively. If the focal length of the lens is 0.1 m. Find (i) the refractive index of the material of lens (ii) power of lens (iii) nature and position of the image of an object placed at a distance of 6 cm from the lens.

Q. The object and the image are at distance of

9 c m

16 c m

respectively from the focal length of an equiconvex lens of radius of curvature

12 c m

. The refractive index of the material of the lens is:

Q. One surface of a biconvex lens having focal length

40 cm

is silvered. The radius of the curvature of the other surface is

60 cm

. At what distance the silvered lens should an object be placed to obtain a real image magnified three times ?

(Refractive index of lens, μL=1.5)

Q. A biconvex lens has a radius of curvature of magnitude

20 cm

and the refractive index of the lens is

1.5

. Which of the following option describe best the image formed of an object of height

2 cm

30 cm

Q. A pin is placed

10 c m

in front of a convex lens of focal length

20 c m,

made of material having refractive index

1.5.

The surface of the lens farther away from the pin is silvered and has a radius of curvature

22 c m .

Determine the position of the final image.

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