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2 years ago

If a light Ray is reflected off the shiny surface at 170 degrees at what angle did the light-ray first strike the surface

Physics

2 answers:

mojhsa [17]2 years ago

7 0

Answer:

The light-ray first strike the surface at angle of 5 degrees.

Explanation:

It is given that,

If a light Ray is reflected off the shiny surface at 170 degrees. We have to determine the light- ray first strike the surface. It is based on the laws of reflection which states that the angle of incidence is equal to the angle of reflection.

Here, the angle between the reflected ray and the surface is 170 degrees. So, it is clear that the angle between the incident ray and the surface is 5 degrees.

garri49 [273]2 years ago

4 0

10 degrees would be your answer hope this helps!

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morpeh [17]

Answer:17.08 s

Explanation:

Given

distance between First and second Runner is 45.6 m

speed of first runner $(v_1)$ =3.1 m/s

speed of second runner $(v_2)$ =4.65 m/s

Distance between first runner and finish line is 250 m

Second runner need to run a distance of 250+45.6=295.6 m

Time required by second runner $t=\frac{295.6}{4.65}=63.56 s$

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Thus second runner reach the finish line 80.64-63.56=17.08 s earlier

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Explanation:

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