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Refraction through a Rectangular Glass Slab

Fill in the b...

Question

Fill in the blanks :
When a ray of light enters a glass slab from the air, it bends ..................... the normal.

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Solution

When a ray of light enters from air to glass, it bends towards the normal and, when a ray of light enters from glass to air, it bends away from the normal.

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A light ray travelling obliquely from a denser medium to a rarer medium bends ................... the normal. A light ray bends ................... the normal when it travels obliquely from a rarer to a denser medium.

When a ray of light from air enters a denser medium, it :

(a) bends away from the normal

(b) bends towards the normal

(c) goes undeviated

(d) is reflected back.

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(a) When a ray of light enters a prism, it bends ___ the normal ; as it leaves the prism, it bends ___ the normal.
(b) White light is composed of ___ colours. The colour of white light deviated through the largest angle by a prism is ___

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