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What are the advantages of studying objects at various wavelengths of radiation?
Wiki User
∙ 16y ago
If you're referring to celestial bodies some are only visible in certain wavelengths. We can observe black holes indirectly by the X-ray radiation emitted by matter which becomes trapped in their gravity well, not close enough to get sucked in but not far enough to escape, so it slingshots around and around emitting high-energy radiation.
Stellar nurseries can be seen through extraterrestrial telescopes with UV filters in the seemingly dark spaces between the "tails" of our galaxy, because the dense hydrogen clouds block all visible light.
Wiki User
∙ 16y ago
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What causes a cosmological redshift?
A redshift occurs when the wavelengths increase in objects by light or electromagnetic radiation levels in an object. In cosmological redshift also has to do with light; however, instead of an increase in wavelengths, there is an expansion of the universe.
What causes the difference between the sun and earth's radiation wavelengths?
Unlike Earth and other solid objects, the entire Sun doesn't rotate at the same rate of gas and plasma, different parts of the Sun spin at different rates.
Why do scientists use telescopes?
Telescopes collect electromagnetic radiation. This radiation may be at wavelengths that the human eye can not see thereby giving us images of the universe that would otherwise be invisible to us. With visible radiation the telescope gathers more light than can pass naturally through the pupil of the human eye and therefore concentrates the light allowing us to see fainter objects or to magnify and resolve features on distant objects. A telescope can also be used as a platform on which to attach other scientific instruments (such as spectrometers) allowing scientists to analyse the information about distant objects contained in the light from those objects.
What is the act of studying the stars?
Astronomy Astronomy is a natural science that deals with the study of celestial objects (such as stars, planets, comets, nebulae, star clusters and galaxies) and phenomena that originate outside the atmosphere of Earth (such as the cosmic background radiation).
18) The amount of radiation that an individual absorbs depends on?
On the amount of radiation emitted; on how close the individual is to the source of the radiation; on any objects in between which might absorb part of the radiation.
What processes produce the difference colors we see in opaque objects?
Different materials absorb different wavelengths of visible radiation from sources like the sun or light bulbs. The wavelengths that are not absorbed are reflected as visible radiation, and the color we see depends on the wavelength of that reflected light, with a longer wavelength correlating to more reddish colors, and shorter wavelengths with more bluish colors. White objects reflect all of the visible radiation that strike them, which is why they absorb less heat than black objects, which reflect much less visible radiation.
What processes produce the different colors we see opaque objects?
Different materials absorb different wavelengths of visible radiation from sources like the sun or light bulbs. The wavelengths that are not absorbed are reflected as visible radiation, and the color we see depends on the wavelength of that reflected light, with a longer wavelength correlating to more reddish colors, and shorter wavelengths with more bluish colors. White objects reflect all of the visible radiation that strike them, which is why they absorb less heat than black objects, which reflect much less visible radiation.
What causes a cosmological redshift?
A redshift occurs when the wavelengths increase in objects by light or electromagnetic radiation levels in an object. In cosmological redshift also has to do with light; however, instead of an increase in wavelengths, there is an expansion of the universe.
What kind of energy enables us to see?
Light, for humans "visible light" which is a form of electromagnetic radiation with a relatively wide range of wavelengths. The absorption or reflection of the various wavelengths of light by objects are what define their color.
What are the advantages of using a popcorn popper over microwave popcorn?
The fact that microwaves uses radiation in order to heat objects can pose a health risk to eaters. Popcorn poppers uses convection to heat objects, so no radiation risks are present.
What color are objects that absorb all colors that reflects little light?
Black objects absorb all or most of the visible wavelengths of light, whereas white objects reflect all wavelengths. When all visible wavelengths (violet to red) enter the eye in equal proportions, the color is perceived as white. When no wavelengths reach the eye, the color is perceived as black. Every other color is a mixture of this continuum of wavelengths.
When radiation occurs between two objects do the two objects need to be touching.?
The answer to this question is no. Radiation can occur when objects are not touching
Can energy cannot be felt but can be seen?
Yes. There are several forms of energy that can be felt, or in other words, detected by our senses. For example, infrared radiation is emitted from warm objects and this can be detected by temperator receptors on our skin. Infrared radiation is due to certain wavelengths of the electromagnetic spectrum and would therefore be a form of energy, electromagnetic energy. The photoreceptors in our eyes are not able to detect infrared wavelengths of light.
How hot is infrared radiation?
Infrared radiation is sometimes referred to as thermal radiation. The temperature of infrared radiation varies from object to object. All objects radiate infrared, even objects at room temperature and frozen objects.
What do mirrors and other objects do pertaining to light?
Mirrors and other objects reflect light, though most objects absorb some wave lengths and reflect others and black absorbs all wavelengths and white reflects all wavelengths.
Do hotter objects emit more infrared radiation?
True , because the warmer objects give off more infrared radiation than cooler objects ..
How do opaque objects get their colors?
Reflects, other wavelengths (colours) are absorbed
