Focal length of convex mirror M1 is 20 c...

Focal length of convex mirror `M_1` is 20 cm and that of concave mirror `M_2` is 30 cm .Find position of second image `I_2`.Take first reflection from `M_1`.

Text Solution

Verified by Experts

For `M_1` `u_1=-(-20 cm)`
`f_1=(+20 cm)`
Using the mirror formula ,
` (1/v)+(1/u)=(1/f)`
we have, `(1/v_2)+(1/-40)=(1/-30)`
` :. V_2=P_2 I_2=-120 cm`.

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Find the focal length of a convex mirror of radius of curvature 1 m.

1.5m

0.5m

Two mirrors, one concave and the other convex, are placed 60 cm apart with their reflecting surfaces facing each other. An object is placed 30 cm from the pole of either of them on their axis. If the focal lengths of both the mirrors are 15 cm, the position of the image formed by reflection, first at the convex and then at the concave mirror, is:

19.09 cm from the pole of the concave mirror

19.09 cm from the pole of the convex mirror

11.09 cm from the pole of the concave mirror

11.09 cm from the pole of the convex mirror

Two mirrors, one concave and the other convex, are placed 60 cm apart with their reflecting surfaces facing each other . An object is placed 30 cm from the pole of either of them on their axis. If the focal lengths of both the mirrors are 15 cm , the position of the image formed by reflection, first at the convex and then at the concave mirrors , is