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Crank
4 years ago
6

Two mirrors are at right angles to one another. A light ray is incident on the first at an angle of 30° with respect to the norm

al to the surface. What is the angle of reflection from the second surface?

Physics
1 answer:
marta [7]4 years ago
7 0

Answer:

reflected angle - secod mirror = 60°

Explanation:

I attached an image with the solution to this problem below.

In the solution the reflection law, incident angle = reflected angle, is used. Furthermore some trigonometric relation is used.

You can notice in the image that the angle of reflection in the second mirror is 60°

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In Requiem for a Dream, the DP uses a device that straps the camera to the actor's chest to achieve a very subjective shot. What
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8 0
3 years ago
Read 2 more answers
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3.02x10^8
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4 0
4 years ago
Read 2 more answers
A car slows down at -5.00 m/s^2 until it comes to a stop after travelling 15.0 m. How much time did it take to stop?
Xelga [282]
In physics, there are already derived equation that are based on Newton's Law of Motions. The rectilinear motions at constant acceleration have the following equations:

x = v₁t + 1/2 at²
a = (v₂-v₁)/t

where
x is the distance travelled
v₁ is the initial velocity
v₂ is the final velocity
a is the acceleration
t is the time

Now, we solve first the second equation. Since it mentions that the car comes eventually to a stop, v₂ = 0. Then,

-5 = (0-v₁)/t
-5t = -v₁
v₁ = 5t

We use this new equation to substitute to the first one:
x = v₁t + 1/2 at²
15 = 5t(t) + 1/2(-5)t²
15 = 5t² - 5/2 t²
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Therefore, the time it took to travel 15 m at a deceleration of -5 m/s² is 2.45 seconds.

5 0
3 years ago
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