Speed of Light in Different Materials

Light has the highest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45

• diamond
• water
• flint glass
• barium glass

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Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45

• diamond
• water
• flint glass
• barium glass

The velocity of light in vacuum is _______ m/s.

• 3x10⁸
• 3x10¹²
• 3x10⁶
• 3x10¹⁰

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Light travels through a liquid at 2.25x10⁸ m/s. What is the index of the liquid? (speed of light in air is 3 x10⁸ ms^-1)

• 1.33

• 1.0

• 1.523

• 2.45

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Light travels at 1.76x10⁸ m/s through an optical medium. What is the medium?

diamond n=2.45

flint glass n=1.70

barium glass n=1.60

crown glass n=1.523

• Crown Glass

• Barium Glass

• Flint Glass

• Diamond

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What is the speed of light in diamond whose refractive index is 2.42? (speed of light in air is 3 x 10⁸ ms^-1)

• 3.5 x 10⁸ ms^-1

• 1.24 x 10⁸ ms^-1

• 2.6 x 10⁸ ms^-1

• 2. 32 x 10⁸ ms^-1

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What is the refractive index of a medium in which light travels at a speed of 1.25 x 10⁸ ms^-1? (speed of light in air is 3 x10⁸ ms^-1)

• 3.1

• 2.8

• 1.7

• 2.4

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