Question

A composite slab consisting of different media is placed in front of concave mirror of radius of curvature as shown in Fig. The whole arrangement is immersed in water. Locate the final image of point object .

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Updated on : 2022-09-05
Solution
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Given: A composite slab consisting of different media is placed in front of a concave mirror of radius of curvature 150 cm. The whole arrangement is immersed in water.
To find the location of the final image of point object O.
Solution:
The image formed after 4 refraction would be taken as the object. 
The distance of object (4 image) from mirror's pole is given by
Hence, the ray will retrace its path,i.e., it is formed on  54cm slab.

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