Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [wavelength]

The tag has no usage guidance.

-1
votes
0answers
55 views

What's wavelength of the hydrogen atom determines the speed of the gas orbiting at the outer edge of the Milky Way?

The 21-cm spectral line emitted by the hydrogen atom is used to study the structure of the Milky Way because the wavelength is too long to be blocked by the dust in interstellar space. What ...
1
vote
0answers
22 views

What could be observed with LOFAR in 230 MHz - 10.0 MHz wavelength?

Nuclear astrophysics greatly interests me and i was wondering if there is something that could be observed with the LOFAR project in this wavelength that would benefit the field? Also some general ...
1
vote
0answers
64 views

Conversion factors for flux

I have a flux value in the infrared band of 8 mJy at a wavelength of 80 microns that I want to translate into X-ray conventional ...
1
vote
1answer
62 views

Deep space radiation distribution

What frequency distribution law applies to a random point in deep space that is assumed to be far away from any particular source of radiation. Can it be expressed by some form of Plancks/Bose-...
5
votes
3answers
91 views

Does a gravitational wave loses energy over distance?

How does a gravitational wave travel over vast distances without losing its energy? Could they go on forever as long as the Space? Thank you
1
vote
2answers
45 views

Wavelengths for observed objects — emitted or observed?

The WISE craft (Widefield Infrared Survey Explorer) surveys the sky in 4 wavelength bands; 3.4, 4.6, 12, and 22 $\mu$m. When it's observing an object with an estimated redshift (given by $z = \frac{\...
0
votes
0answers
80 views

Does space not make sound, or can we just not hear it? [duplicate]

This is a question regarding sound waves and space. I know that sound waves must travel through a medium "air", enter our brains, and then we can decipher what exactly the sound is. But in space, ...
3
votes
1answer
61 views

Does wavelength affect redshift caused by the metric expansion of space?

Does wavelength play a role in cosmological redshift? Do we see certain wavelengths affected less by expansion or notice any delay in arrival of certain wavelengths? How accurate are any observations?...
2
votes
1answer
47 views

What wavelengths are used to search for distant solar system objects like KBOs and Oort cloud members?

What wavelengths of light are used/most suited to search for distant solar system objects like KBOs and Oort cloud members? I suppose they are brightest in reflected sunlight, so they are best ...
2
votes
1answer
241 views

Question about doppler effect

We know that we can use Doppler effect to determine equatorial velocity of a planet. We send a electromagnetic wave with wavelength $\lambda_0$ to an equatorial edge of planet and we get wavelength $\...
8
votes
1answer
172 views

At what wavelengths can black hole Sagittarius A* be observed from Earth?

The supermassive black hole in the center of the Milky Way is blocked by dust and gas clouds as seen from where we are. Which wavelengths are blocked and which are most undisturbed for observation of ...
18
votes
2answers
2k views

Why are wavelengths shorter than visible light neglected by new telescopes?

The diagram below, which I stole from this post by @HDE226868, shows that angular resolution as a function of wavelength suddenly drops by three orders of magnitudes from visible to UV-light. The ...
1
vote
1answer
688 views

How do I apply a velocity shift to a wavelength array with uniform logarithmic spacing?

Suppose I have a wavelength array for a spectrum in units of Angstroms. Suppose further that the wavelength has "uniform logarithmic spacing" such that if I just take the difference in Angstroms ...
14
votes
3answers
2k views

What wavelength to best detect the “9th planet”?

We know that the reflected sunlight will make detecting the 9th planet very difficult in the visible light. Is there another band that will be more likely to detect it? What is the surface temperature ...
-1
votes
1answer
290 views

Did Big Bang sound as loud as we think?

As we all know, There is no sound in space, because sound waves don't travel in a vacuum. But even if Big Bang did sound, what was the main source of it's cause?
3
votes
3answers
546 views

What is the average color of the universe?

Our Earth, being a beautiful blue orb, has an overall perceived wavelength of somewhere near 470 nm, that being the wavelength of light blue, because the oceans play an enormous role in the weighted ...
3
votes
1answer
66 views

How do we convert other waves of the EMS to visible light?

So I just had a quick question and I was wondering how we convert other waves of the electromagnetic spectrum to visible light waves. For example we use X-ray's or radio waves to see things in space ...
2
votes
3answers
3k views

Longest and shortest wavelength

What is the longest and what is the shortest wavelength of light? How fast would a light-emitting object have to recede in order to shift the frequency of light to increase the wavelength from the ...
0
votes
1answer
59 views

Can stars be observed from space by x-rays, near infrared and radio wavelengths? [closed]

I have a doubt. Can stars be observed from space by x-rays, near infrared and radio wavelengths?