Question

(b) Light enters from air to a glass plate which has refractive index of 1.5. Calculate the speed of light
in glass. The speed of light in air is 3.0x 10ms

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Answer 1

Answer:

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Answer 2

Answer:

$\huge\sf\boxed{\green{ANSWER:-}}$

$\huge\bold\star\red{Given parameters}\star$

==>> Speed of light in vacuum (c) = 3 × 10⁸ ms-1

==>> Refractive index of glass (ng) = 1.50

➢Refractive index of a medium = Speed of light in vacuum/Speed of light in the medium

➢Refractive index of glass = Speed of light in vacuum/Speed of light in the glass

Speed of light in the glass (v) = Speed of light in vacuum/ Refractive index of glass

==> v = c/ng

==> v = (3 × 10⁸)/1.50

$\huge\sf\boxed{\green{v = 2 ×10⁸ ms-1}}$