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ozzi
2 years ago
15

A beam of light shining from water to air strikes the surface at an angle greater than 48° and produces total internal reflectio

n. If the incident beam is at a 50° angle, at what angle is the reflected beam?
Physics
1 answer:
shepuryov [24]2 years ago
3 0
<span>To find the solution for this problem, let us remember that the angle of incidence and the angle of reflection are always the same. Thus,  the reflected beam would be at an angle of 50 degrees as wel</span>l.

<span> Total internal reflection means that the total amount of incident light at the boundary between two media gets reflected, and therefore no beam of light is transmitted to </span>the air in this case.

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It had to be b Druidic
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2 years ago
Imagine an advanced civilization living on a planet orbiting at a distance of 10 AU (1.5 billion kilometers) from a close binary
aksik [14]

Answer:

Civilization's planet is most likely to be doomed because within the next million years the red giant star will possibly supernova.

Explanation:

Civilization's planet is most likely to be doomed because within the next million years the red giant star will possibly supernova. The supernova is the bursting of the star that has reached its end life. This leads to release of massive amount of energy, which can be more than the heat and energy released by the sun.

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3 years ago
Light enters a substance from air at 30 degrees to thenormal.
Gwar [14]

Answer:

Explanation:

The angle of incidence and refraction are both measured from the normal

angle of incidence = 30°

angle of refraction = 23°

refractive index(n) = sini / sinr

n = sin30°/sin23°

n = 1.27965

refractive index (n) = 1/sinC

where C is the critical angle.

sinC= 1/n

C =arcsin (1/n)

C =arcsin (1/1.27965)

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5 0
3 years ago
Gravity can be described as (2 points)
ladessa [460]

Answer:

"the force of attraction between two objects"

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6 0
3 years ago
Suppose your hair grows at the rate of 1/26 inches per day. Find the rate at which it rows in nanometers per second. Because the
notka56 [123]

Answer:

11.306 nm/s

or

113.06 atomic layers/sec

Explanation:

Hello!

First we need to know how much an inch equals in nanometers and a day in seconds:

Since <em>1inch = 2.54cm</em> and <em>1cm=10^7nm</em>

<em>      </em>1 inch = 2.54 * 10^7 nm<em> </em>

<em />

Also <em>1day = 24hours = 24*60minutes = 24*60*60seconds</em>

<em>    </em>1 day = 86.4 * 10^3 s

Therefore the rate at which the hair grows in nanometers per seconds is:

    1/26 in/day = (1/26) * (2.54*10^7)/(86.4*10^3) = 11.306 nm/s

 

Now, if 1 atomic layer = 0.1 nm this means that 1 nm = 10 atomic layers.

Therefore:

The rate in atomic layers is

11.306 nm/s = 11.306 (10 atomic layers)/s = 113.06 atomic layers/sec

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5 0
3 years ago
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