Question

An object is placed at distance of 10cm from a concave mirror of focal length

20cm.

(a). Draw a ray diagram for the formation of the image.

(b). Calculate the image distance.

(c). State two characteristics of the image formed.


2. An object is kept at a distance of 5cm in front of a convex mirror of focal length

10cm. Calculate the position and magnification of the image and state its

nature.


3. An object is placed 15cm from (a) a converging mirror and (b) a diverging

mirror, of radius of curvature 20cm. Calculate the image position and

magnification in each case.


4. The speed of light in air is 3×108 m/s. In medium x its speed is 2×108 m/s and in

medium y the speed of light is 2.5×108 m/s. Calculate:

(a) airnx (b) airny (c) xny (d) ynx


5. For the same angle of incidence in media A,B and C, the angles of refraction

are 200

, 300

and 400

respectively. In which medium will the velocity of light and

refractive index be maximum? Give reason in support of your answer.​

Answer 1

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