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tiny-mole [99]
4 years ago
13

If all distant galaxies are expanding away from us, does this mean we’re at the center of the universe?

Physics
1 answer:
yuradex [85]4 years ago
4 0

Answer:

No

Explanation:

Is a thing of relativity and perspective, let me put it this way: if you have lived all of your life in an island and you only see water around you, you will feel that you are in the middle of the sea, the farthest you can see is always the same distance and if you look at the same distance in all directions you will be at the center in the end.

Not all galaxies are expanding away, andromeda is in course to collide with the milky way. We are going to be in the same space that Andromeda some day! but no worries, it's really improbable that even a star from Andromeda crash with a star of the milky way, the distance among those stars is huge!

We are not in the center of the universe, we look in all directions of the universe and how we can see the same distance it might feel like we are in the center, but it's not necessary true.

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Valentin [98]
The answer is false hope this helps
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3 years ago
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The Cassegrain design provides more compact (shorter) telescopes. Why? (Examine figures 2.4.2 and 2.4.3). The shorter design is
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Answer:

Because the light reflects multiple times until it gets to the Cassegrain focus.

Explanation:

The Cassegrain design can be seen in a reflecting telescope. In this type of design the light is collected by a concave mirror, and then intercepted by a secondary convex mirror, and sends it down to a central opening in the primary mirror (concave mirror), in which a detector is placed (Cassegrain focus)

Since, the light is reflected many times due to Cassegrain design, that leads to shorter telescopes.                    

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3 years ago
Explain The Big Bang Theory in 100 Words​
mixer [17]

Answer:

The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today.

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HOPE IT HELP

7 0
3 years ago
Let's apply Snell's law to the refraction of light across a water–air interface. Suppose you kneel beside the fishpond in your b
Nataliya [291]

Answer:

The angle of refraction is 41.68°.

Explanation:

The refractive index for water is n_2 = 1.333, and for air n_1 = 1.00: the angle of light with the normal is 90^o-60^o = 30^o; therefore Snell's law gives

n_1sin(\theta_1)= n_2sin(\theta_2)

1.00*sin(\theta_1) = 1.33 sin(30^o)

sin (\theta_1) = \dfrac{1.33sin(30^o)}{1.00}

sin (\theta_1) = 0.665

\theta _1 = sin^{-1}(0.665)

\boxed{\theta_1 = 41.68^o}

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mezya [45]
Sure what do u need help with
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