What does a refractive index from medium 1 to medium 2 mean? Isn't one of the medium must be vacuum?

Physics

1 answer:

Musya8 [376]4 years ago

6 0

Refractive index is the measure of bending of a ray of light when passing from one medium into another. It is not necessary that one medium must be vaccum.

For example, the image below shows refraction, where first medium is air and second medium is water.

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victus00 [196]

Answer: $\theta =33.22^{\circ}$

Explanation:

Given

Velocity of Passenger w.r.t to Ferry

$v_{pf}=v_p-v_f=1.55\hat{j}$ -------1

Velocity of Passenger w.r.t to water

$v_{pw}=v_p-v_w=4.5\left ( -\hat{i}+\hat{j}\right )$ --------2

Subtract 2 from 1

$v_f-v_w=-4.5\hat{i}+2.95\hat{j}$

(b)direction

$tan\theta =\frac{2.95}{4.5}=0.655$

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4 years ago

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soldier1979 [14.2K]

Because rockets do accelerate in space and have been able to do so for a long time.

Answer: Option D

<u>Explanation:</u>

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Harrizon [31]

This is an elastic collision

bcuz i think they move apart after the collision

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A sanding disk with rotational inertia 6.5 x 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of magnit

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Answer:

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Explanation: