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What is revealed by observing the sun at a very narrow range of wavelengths within the 656 nm hydrogen alpha line?
Wiki User
∙ 11y ago
the structure of the chromosphere
Wiki User
∙ 11y ago
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Why light rays are considered as electromagnetic waves?
Mainly because that's what they are. Exactly the same physical phenomenon as radio, microwave, heat radiation, ultraviolet, X-rays, and gamma rays, but with wavelengths in the narrow range that your eyes can detect.
Our eyes detect wavelengths as what?
The eyes of all seeing animals are restricted to a narrow range of the electromagnetic spectrum with wavelengths from about 400 to 700 nm (nanometers). Within this range, not all animals can distinguish between different colors; some see in shades of grey. A healthy human eye, which does distinguish between different colors, normally detects wavelengths from 390 nm (violet) to 750 nm (red). Some animals can detect wavelengths slightly into the ultraviolet region of the spectrum, i.e. wavelengths shorter than 390 nm, that humans cannot detect. Colors that are visible to humans run from violet through blue, cyan, green, yellow, orange, and finally red. Brown is a mix of red, yellow, and blue. White is a mix of all the colors at once. Black is not a color, but the lack of color because a black surface absorbs light without reflecting much of it back.
What is a push broom sensor?
There are many dimensions that sensors work in. A normal camera, for instance, works in 2 dimensions and basically takes an average of all visible wavelengths it can see as the color it receives per pixel. Spectral imagers are capable of filtering out individual wavelengths to see the intensity of light at those individual wavelengths for analysis purposes. These types of cameras, therefore, have 3 dimensions they need to work in: 2 spacial and 1 spectral. But, as of now, there really is no imaging system that can do 3 dimensions simultaneously one of the dimensions needs to be spread through time. In some systems they scan the various wavelengths of a full image in succession (2 spacial dimensions with spectral spread over time). Others are able to scan a very long narrow area and split it up into many wavelengths at once and move the view of the scene perpendicular to the long side of the view(1 spacial and the spectral dimensions simultaneously and the second spacial dimension over time). The second method is a pushbroom system it views a narrow area and moves the view along to see a full scene over time. I hope that was moderately clear.
What does monochramatic mean?
It means 'single-colored'. Filters can be made that let through only a very narrow band of wavelengths, and they appear to be a single color although they do actually pass a little bit on either side. The closest things we have to true monochromatic sources are the laser and the electronic oscillator.
What is narrow opening?
A narrow opening can be considered a slit. Narrow openings can be very long or short. There are many different types of narrow openings.
What is a very narrow range of wavelengths in the electromagnetic spectrum that humans can see?
Visible light.
What is detected by the eyes?
The eye detects visual light, which is a quite narrow spectrum of electromagnetic wavelengths.
Why do we use filters in planck's constant experiment?
we use a broad source of visible wavelengths from the lamp. These were then filtered to a variety of narrow bands of wavelengths (from placing different filters in the apparatus)
Why is a photon seen as narrow bars of light instead of a rainbow of lights?
A photon is just one particle, having necessarily just one wavelength; it cannot produce a rainbow, which requires a whole range of wavelengths. The narrow bar effect is the result of the instrument used to measure a photon, which has a narrow slit through which the photon passes.
How is sound projected?
The directivity (narrowness) of all wave producing sources depends on the size of the source, compared to the wavelengths it generates. Audible sound has wavelengths ranging from a few inches to several feet, and because these wavelengths are comparable to the size of most loudspeakers, sound generally propagates omnidirectionally. Only by creating a sound source much larger than the wavelengths it produces can a narrow beam be created. In the past, loudspeaker manufacturers have created large speaker panels or used reflective domes to provide some directivity but, due to the sound's large wavelengths, the directivity of these devices is still extremely weak.
How are the continuous bright line spectrum and spectral lines similar?
In a continuous spectrum, you see every color in visible light from wavelengths around 380 nm to 780 nm. The bright light spectrum has only light at specific wavelengths, forming narrow regions of lights. This is characteristic of a particular substance, emitting these lights from its unique electron configuration. Light at specific wavelengths is emitted for different substances, but not a continuous rainbow.
Why light rays are considered as electromagnetic waves?
Mainly because that's what they are. Exactly the same physical phenomenon as radio, microwave, heat radiation, ultraviolet, X-rays, and gamma rays, but with wavelengths in the narrow range that your eyes can detect.
What light is only one color?
Monochromic light can be photons in a narrow energy range emitted by a laser. Sunlight looks uniform but it is actually composed of all of the wavelengths of visible light (except for a few that have been absorbed in the atmosphere).
Our eyes detect wavelengths as what?
The eyes of all seeing animals are restricted to a narrow range of the electromagnetic spectrum with wavelengths from about 400 to 700 nm (nanometers). Within this range, not all animals can distinguish between different colors; some see in shades of grey. A healthy human eye, which does distinguish between different colors, normally detects wavelengths from 390 nm (violet) to 750 nm (red). Some animals can detect wavelengths slightly into the ultraviolet region of the spectrum, i.e. wavelengths shorter than 390 nm, that humans cannot detect. Colors that are visible to humans run from violet through blue, cyan, green, yellow, orange, and finally red. Brown is a mix of red, yellow, and blue. White is a mix of all the colors at once. Black is not a color, but the lack of color because a black surface absorbs light without reflecting much of it back.
Why is chromatic aberration more evident from some positions of the aperture?
because refraction is greater for shorter wavelengths. for a narrow aperture, you may not notice the difference. but for wide aperture, you will, because you are involving more of its curvature. check what a prism does, you'll see the same effect.
Theory of gas diffusion coefficient of acetone using winkelmann method?
The theory of gas diffusion coefficient of acetone using the winkelmann method is to diffuse the gas into a volatile liquid. This can be done by confining the liquid in a small narrow tube and observing the rate of evaporation.
How do you put narrow in a sentence?
that is a narrow street.dont go to the narrow stream.
