Answer: the index of refraction of material X will be 1.09 and the angle the light makes with the normal in the air is 81.25°.
Explanation: To find the answer, we need to know the Snell's law.
<h3>What is Snell's law of refraction? Using this, how to solve the problem?</h3>
- The Snell's law for refraction can be written as,

where, i is the incident angle, r is the refracted angle, n is the refractive index.
- As we know that the refractive index of water is 1.33
- For the first case, incident angle from the picture is 65°, and the refracted angle is 48°. Thus, the refractive index of the medium X will be,

- In the second case, incident angle is 48° and we have to find the refracted angle r for the air.
- As we know that the refractive index of air is 1.
- Thus, the refracted angle will be,

Thus, we can conclude that, the index of refraction of material X will be 1.09 and the angle the light makes with the normal in the air is 81.25°.
Learn more about the Snell's law here:
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Answer:
if it is not moving it is zero, like all things that aren't in motion
Explanation:
The formula relating acceleration and angular velocity is:
a = ω^2 r
where a is acceleration, ω is angular velocity and r is
radius
But the angular velocity ω is constant all throughout the
disk therefore:
a1 / r1 = a2 / r2
So at points:
<span>r1 = 0.0130 m ->
a1 = 393 m/s^2</span>
<span>r2 = 0.0884 m ->
a2 = ?</span>
393 / 0.0130 = a2 / 0.0884
<span>a2 = 2,672.4 m/s^2</span>
Answer:
c
Explanation:
just trying to follow basic grammar.