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Alex
3 years ago
14

If the index of refraction of a lens is 1.5, how fast does light travel in the lens?

Physics
2 answers:
lina2011 [118]3 years ago
7 0

Answer:

C.

Explanation:

Len [333]3 years ago
5 0
The speed of light in a material is given by:
v= \frac{c}{n}
where
c=3 \cdot 10^8 m/s is the speed of light in vacuum
n is the refractive index of the material

The lens in this problem has a refractive index of n=1.50, therefore the speed of light in the lens is
v= \frac{c}{n}= \frac{3 \cdot 10^8 m/s}{1.50}=2 \cdot 10^8 m/s

And the correct answer is C).
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