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3 years ago

Which describe reflection? Check all that apply.

Physics

2 answers:

BigorU [14]3 years ago

8 0

Answer:

<h2>Light bounces off a boundary.</h2><h2>Light direction is determined using the law of reflection.</h2>

Explanation:

In physics, reflection is studied using light rays. Specifically, it's the process of bouncing off an object surface, that is, the light hits a surface and "move back".

This subject is studied in geomtric optics, because we use the geometry tools to understand, analyse and predict the behaviour of a light beam when hits an object.

Reflection is studied applying the Law of Reflection which statest that the angle of incidence is congruent with the angle of reflection regarding a normal axis. The image attached shows this law.

Therefore, the correct answer are the first and last choice, because as we said before, reflection is the light action of bouncing off a boundary or a object surface, if light doesn't bounce off and instead goes through, that's called refraction. Also, we saw that the law of reflection basically defines light reflections phenomena.

ziro4ka [17]3 years ago

4 0

light bounces off a boundary and light direction is determined using the lawof reflection

I hope it helped

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In an attempt to escape his island, Gilligan builds a raft and sets to sea. The wind shifts a great deal during the day, and he

lana [24]

Answer:8.28 km

Explanation:

Given

First it drifts $45^{\circ}$ 2.5 km

$r_1=2.5cos45 i+2.5sin45 j$

Secondly it drifts $60^{\circ}$ 4.70 km

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After that it drifted along east direction 5.1 km

$r_{23}=5.1 i$

After that it drifts $55^{\circ}$ 7.2 km

$r_{34}=-7.2cos55 i-7.2sin55 j$

After that it drifts $5^{\circ}$ 2.8 km

$r_{54}=-2.8cos5 i+2.8sin5 j$

$r_{5O}$ = $\left [ 2.5cos45+4.7cos60+5.1-7.2cos55-2.8cos5\right ]\hat{i}$ + $\left [ 2.5sin45-4.7sin60-7.2sin55+2.8sin5\right ]\hat{j}$

$r_{5O}=2.299\hat{i}-7.95\hat{j}$

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for direction

$tan\theta =\frac{7.95}{2.299}=3.4580$

$\theta =73.87^{\circ}$ south of east

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