Question

Ignoring dust extinction in the answer, why is that the most distant galaxies much easier to...

Ignoring dust extinction in the answer, why is that the most distant galaxies much easier to see in infrared light than visible light?

Science   Advanced-Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

The Universe is expanding. This means that from Earth, astronomers see that the most distant galaxies seem to be moving away much faster than those that are close by. As the distant galaxy travels away from us, the wavelength of light that it emits stretches and is "redshifted" toward the infrared part of the electromagnetic spectrum. This means that a very distant galaxy emitting primarily visible or ultraviolet light will appear infrared by the time its light reaches Earth.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1.Elliptical galaxies tend to be redder in colour than spiral galaxies. Why is this? Question 10...
1.Elliptical galaxies tend to be redder in colour than spiral galaxies. Why is this? Question 10 options: A.The dust in spiral galaxies preferentially reflects blue light making the galaxy look bluer B.Elliptical galaxies have more dust which reddens the light from them. C.Elliptical galaxies have no star formation and are made of cooler, older stars. D.Elliptical galaxies are farther away so their light is red shifted more 2. Dark energy is responsible for what aspect of the universe? A.The accelerated...
When quasars were first discovered, why did astronomers conclude they were very distant objects? A. They...
When quasars were first discovered, why did astronomers conclude they were very distant objects? A. They were obviously in galaxies known to be very distant B. They had high redshifts C. They were extremely bright D. They were surrounded by very old stars 10 points    QUESTION 7 What is a tidal tail? A. A jet of hot plasma emitted by an active galactic nucleus B. A stream of stars resulting from a galactic merger event C. A dust lane...
Discuss, why using antibiotics to treat bacterial infection is much easier than using anti- fungal agents...
Discuss, why using antibiotics to treat bacterial infection is much easier than using anti- fungal agents to treat fungal infection?
why do penicillins and cephalosporins have a much higher therapeutic index than most other antibiotics?
why do penicillins and cephalosporins have a much higher therapeutic index than most other antibiotics?
Please answer the 3 questions, please provide brief explanation. Urgent, thanks. 31. Why does metabolic rate...
Please answer the 3 questions, please provide brief explanation. Urgent, thanks. 31. Why does metabolic rate in endotherms change in a much more linear fashion than ectotherms? A. evolution in endotherms favors enantiostasis, while evolution in endotherms does not B. endotherms are better at homeophasic adaptation of membranes, while ectotherms are better at homeoviscous adaptation of membranes C. endotherms use counter current exchange for thermoregulation, while ectotherms use bidirectional exchange for thermoregulation D. metabolic rate in ectotherms is physiologically regulated,...
Technology has made telecommuting easier for workers, and most companies seem willing to let workers do...
Technology has made telecommuting easier for workers, and most companies seem willing to let workers do their work remotely, at least on an occasional basis if the position allows for it. According to the Gallup's annual Work and Education poll, conducted Aug. 5-9, 2015, 37% of U.S. workers say they have telecommuted in 2015. Assume that 37% is an accurate representation of all U.S. workers. A company executive believes that in 2018, the proportion of all U.S. workers who telecommuted...
A. The human eye 1. Whenever a normal eye forms an image, the image distance will...
A. The human eye 1. Whenever a normal eye forms an image, the image distance will always equal the distance from the cornea and eye lens to the retina (~25 mm), regardless of how far away the object is located. Explain why the image distance cannot change. 2. If the image distance must change, then what intrinsic property of the eye lens must change in order for the eye to focus on objects at different distances? Hint: read the Introduction....
Hey i just read your comment and you just need to answer do you agree or...
Hey i just read your comment and you just need to answer do you agree or disagree with ir and explain My Teacher gave this answer and we need to response this answer You need to response this answer why you agree with it or why you disagree and explain You have Two Answer you need to response on your own word Reactions may include: feedback, agreements, disagreements, etc. with supporting facts, material, citations, etc. to support your reaction (or...
Please answer following questions for case provided below: 1) Why do patients who are not critically...
Please answer following questions for case provided below: 1) Why do patients who are not critically ill go to emergency department? 2) Why do the variety of services emergency department produce and the amount of overhead to be allocated make cost finding difficult. 3) Why was Morgan confident that cots could be reduced while quality could be improved? Is this conclusion supported in the literature? 4) Thinking as a consumer, what would constitute higher quality in the emergency department? 5)...
I need to answer the questions based on the following article The article is Although the...
I need to answer the questions based on the following article The article is Although the virus has delayed the budget until October, Treasurer Josh Frydenberg will deliver an update on the budget and – more importantly – the economy, within the next fortnight. But last week the secretary to the Treasury dropped some big hints on what to expect. In evidence to the Senate committee inquiring into the response to the virus, Dr Steven Kennedy started with the outlook...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT