Question

please answer b, c and d.
don't google it, I have already tried it.​

Answer 1

Answer:

Explanation:

(A) refractive index is the ratio of speed of vacuum to the speed of light in any substance;

here , it means that speed of light is more faster than diamond by 2.42 times

(C)in plane mirror

     size of object is equal to the size of the image

    in concave mirror

     size of image is enlarged than the size of object

     in convex mirror

     the size of image is diminished than the size object

(D) negative sign in the magnification indicates that the image is real and is formed below the principal axis

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