Light travels more quickly through water than through glass .
(a) Which is optically denser : water or glass
(b) If a ray of light passes from glass into water , which way will it bend : towards the normal or away from the normal

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Solution

(a) Glass is optically denser than the water .
(b) The ray will bend away from the normal .

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(b) Air is optically ___ than glass.

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(f) The splitting of white light into its constituent colours is called ___

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(j) A ___ mirror always forms a virtual image.

(k) A concave mirror forms a virtual image for an object placed ___

Ans. (a) denser (b) rarer (c) away from (d) towards (e) disperses (f) dispersion

(g) concave (h) two times (i) $0^{\circ}$ (j) convex (k) between pole and focus

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