If a medium is denser than air, the speed of light will be:

$l e s s e r i n t h a t m e d i u m .$

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$m o r e i n t h a t m e d i u m .$

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$s a m e t h r o u g h o u t .$

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$c a n n o t b e p r e d i c t e d .$

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Solution

The correct option is A
$l e s s e r i n t h a t m e d i u m .$

When light travels from a rarer medium to a denser medium, the speed of light will decrease.
According to Snell's law
$μ = \frac{c}{v}$
A denser medium has a greater refractive index when compared to an optically rarer medium.
Speed will decrease while traveling from rarer to denser medium.
Hence, the correct answer is an option (A) i.e. $l e s s e r i n t h a t m e d i u m .$

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Similar questions

Fill in the blanks to complete the following sentences:

(a) When light travels from a rarer to a denser medium, its speed .............

(b) When light travels from a denser to a rarer medium, its speed..........

(c) The refractive index of glass with respect to air is 3/2. The refractive index of air with respect to glass will be....................

The speed of light in a denser medium is more than in a rarer medium.

3 \times 10^{8} m / s

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