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Fermat's Principle of Least Time

Light rays wh...

Question

Light rays while entering a denser medium from a rarer medium, bends towards the normal.

A

True

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B

False

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Solution

The correct option is A True
The speed of light rays while entering a denser medium from a rarer medium decreases and to reach at the destination in the shortest time (Fermat's principle), it bends towards the normal.

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Q. Light bends towards normal while entering a rarer medium from a denser medium.

Light rays bend towards the normal because they slow down when moving from a rarer medium to denser medium.

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Q. Fill in the blanks :

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.

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