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3 years ago

The index of refraction for water is about 4/3. What happens to light when it travels from air into water?

Physics

1 answer:

tankabanditka [31]3 years ago

6 0

Answer:

The light slows down to a speed equal to 3/4 of its original value

Explanation:

The speed of light in a medium is given by:

$v=\frac{c}{n}$

where

$c=3.0\cdot 10^8 m/s$ is the speed of light in a vacuum

n is the index of refraction of the medium

For light entering air, we have that the light enters a medium with index of refraction of

$n=\frac{4}{3}$

Therefore, its speed changes as follows

$v=\frac{c}{\frac{4}{3}}=\frac{3}{4}c=\frac{3}{4}(3\cdot 10^8 m/s)=2.25\cdot 10^8 m/s$

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KengaRu [80]

First, you find the velocity at each component. The general equation is:

a = (v2 - v1)/t

a,x = (v2,x - v1,x)/t
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a,y = (v2,y - v1,y)/t
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v2,y = -1.94 m/s

To find the final speed, find the resultant velocity by taking the hypotenuse.

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3 years ago

A high jumper jumps over a bar that is 2 m above the mat. With what velocity does the jumper strike the mat in the landing area?

docker41 [41]

Answer:

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Explanation:

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