PHYSICS
JAMB 2017 - Question 38
Physics 2017 JAMB Past Questions - Question 38: The speed of light in air is 3 x 108ms^-1. If the refractive index of light from air-to-water is 4/3, then which of the following is the correct value of the speed of light in water?
Choose the correct answers from the options given.
A:
B:
C:
D:
Correct Answer
B
Explanation
To find the speed of light in water, we can use the formula:
Speed of light in air / Refractive index of air-to-water = Speed of light in water
Given that the speed of light in air is 3 x 10^8 m/s and the refractive index of air-to-water is 4/3, we can substitute these values into the formula:
(3 x 10^8 m/s) / (4/3) = (3 x 10^8 m/s) * (3/4) = 2.25 x 10^8 m/s
Therefore, the correct value for the speed of light in water is 2.25 x 10^8 m/s.
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