A beam of light travels from air to water. If the refractive index of water is 1.5; the air refractive index is 1 and the light propagation in the air is 3 × 10 ^ 8 then determine the speed of light in the water?
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CLASS = 8
LESSON = PHYSICS
CATEGORY = Light
KEYWORDS = Refractive index, air, light
Known :
na = 1.5
nu = 1
vu = 3x10⁸ m / s
Asked: Va?
Answered:
Va / Vu = nu / na
Va / 3x10⁸ = 1 / 1.5
Va = 1 / 1.5 x 3x10⁸
Va = 2x10⁸ m / s
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