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3 years ago

Which takes longer to reach earth, light from the sun or light from other stars? Explain.

Physics

2 answers:

tigry1 [53]3 years ago

7 0

Light from stars take longer to reach earth because the stars are further than the sun

densk [106]3 years ago

4 0

Light from other stars take longer to reach the earth because they are farther than our sun.

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Help please!

kipiarov [429]

<h2>Answer: Diamond</h2>

Explanation:

This described situation is known as Refraction, a phenomenon in which the light bends or changes it direction when passing through a medium with a index of refraction different from the other medium.

In this context, the index of refraction is a number that describes how fast light propagates through a medium or material.

According to Snell’s Law:

$n_{1}sin(\theta_{1})=n_{2}sin(\theta_{2})$ (1)

Where:

$n_{1}=1$ is the first medium index of refraction (air)

$n_{2}$ is the second medium index of refraction (the value we want to know)

$\theta_{1}=27\°$ is the angle of the incident ray

$\theta_{2}=11\°$ is the angle of the refracted ray

Now, let's find $n_{2}$ from (1):

$n_{2}=n_{1}\frac{sin(\theta_{1}}{sin(\theta_{2}}$ (2)

Substituting the known values:

$n_{2}=(1)\frac{sin(27\°)}{sin(11\°)}}$

Finally:

$n_{2}=2.379\approx 2.4$

If we compare this result with the given table, the index of refraction value that is close to this number is diamond's index of refraction.

Therefore, the correct option is A: the material is diamond.

3 0

3 years ago

Explain two reason why SI is easier than the English System.

kifflom [539]

Answer:

There are several reasons why SI is preferred to the old English system of measurement: ... SI uses base 10, just like our number system, so it is much easier to learn, remember and convert between units. The prefixes used in SI are from Latin and Greek, and they refer to the numbers that the terms represent.

Explanation:

5 0

3 years ago

What is the medium through which sound travels inside a bird’s body? (HINT: three-letter word)

Korvikt [17]

The medium through which sound travels inside a bird’s body is the air. This is further explained below.

Generally, Air is simply defined as the invisible combination of gases, and this gas exists around the Earth.

In conclusion, Sound wave allows birds to communicate.