Change the distance to "Farther". What do you notice about the spectrum of the stationary galaxy compared to the spectrum of the galaxy in motion now?

Question

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1 point
It is exactly the same.
The spectrum shifts to the left, towards blue.
The spectrum shifts to the right, towards red.

Answer 1

When considering a stationary galaxy compared to a galaxy in motion, the key effect we observe is the Doppler effect, which causes shifts in the wavelength of light depending on the motion of the object in relation to the observer.

If the galaxy is moving away from us (receding), we would see a redshift, meaning the spectrum of the galaxy in motion would shift to the right. In contrast, if the galaxy is stationary, its spectrum would remain unchanged.

Therefore, when you change the distance to "farther" (indicating that the galaxy is moving away), you would notice that:

The spectrum shifts to the right, towards red.

So, the correct choice is: The spectrum shifts to the right, towards red.

Answer 2

Change the distance to "Closer". What do you notice about the spectrum of the stationary galaxy compared to the spectrum of the galaxy in motion now?
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1 point
It is exactly the same.
The spectrum shifts to the left, towards blue.
The spectrum shifts to the right, towards red.

Answer 3

When you change the distance to "closer," this indicates that the galaxy is moving towards us (approaching). In this case, we would observe a blueshift, meaning the wavelengths of light are compressed as the galaxy moves closer.

For a stationary galaxy, its spectrum will remain unchanged. However, if the galaxy is in motion towards us, the spectrum would shift to the left, corresponding to the blue end of the spectrum.

Therefore, the correct observation when changing the distance to "closer" is:

The spectrum shifts to the left, towards blue.

Answer 4

Analyze Spectral Shift: Galaxy 1. What type of spectral shift is observed?
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1 point
no shift
blue shift
red shift
green shift

Answer 5

To determine the type of spectral shift observed in Galaxy 1, you need to analyze the wavelengths of the spectral lines in the galaxy's spectrum compared to their positions in a stationary reference (such as laboratory measurements).

• Red Shift indicates that the galaxy is moving away from us, and spectral lines move to longer wavelengths (to the red part of the spectrum).
• Blue Shift indicates that the galaxy is moving towards us, and spectral lines move to shorter wavelengths (to the blue part of the spectrum).
• No Shift means that the spectrum is unchanged and the galaxy is stationary relative to the observer.
• Green Shift is not a standard term in this context; spectral shifts are typically described as red or blue.

Without specific data or a visual representation of Galaxy 1's spectrum, I can't definitively conclude which type of shift is observed. However, based on the definitions:

• If the spectral lines are shifted towards shorter wavelengths, it's a blue shift.
• If they are shifted towards longer wavelengths, it's a red shift.
• If there is no change, then it's no shift.

In summary, you'll need to assess the position of spectral lines in Galaxy 1's spectrum to select one of the options provided (no shift, blue shift, red shift). If you have that information, you could identify the correct choice accordingly.

Answer 6

You have studied the spectra of four sample galaxies and found that three of the four demonstrate red shift. Astronomer Edwin Hubble discovered that only a very few nearby galaxies are moving toward us, demonstrating blue shift. More distant galaxies are all moving away from us, demonstrating red shift as in this example. What does the red shift indicate?
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1 point
The universe is diverging and expanding, which supports the big bang theory.
The universe is converging and shrinking, which contradicts the big bang theory.

Answer 7

The observation of redshift in distant galaxies indicates that they are moving away from us. This phenomenon supports the concept that the universe is expanding. The more distant the galaxy, the greater its redshift, which is a key piece of evidence for the expanding universe model and aligns with the predictions made by the Big Bang theory.

Therefore, the correct answer is:

The universe is diverging and expanding, which supports the big bang theory.

Answer 8

How far away are the galaxies in the Coma Super Galaxy Cluster??
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1 point
300 million light years
300 light years
100 million light years
30 million light years

Answer 9

The Coma Supercluster, which includes the Coma Cluster (an important galaxy cluster), is located approximately 300 million light-years away from Earth.

Therefore, the correct answer is:

300 million light years.