In a peacock's mother - of - pearl tail, precisely arranged hairline grooves reflect
light of certain wavelengths.
Scientists hope that carbon may make a more efficient band - gap material — a material that excludes
light of certain wavelengths and is therefore the photonic counterpart of a semiconductor — in future optoelectronics applications.
Light of a certain wavelength can be used to put so - called active materials into motion and control their movement.
The first method requires a complex ligand, or compound, that strongly binds to a metal ion in a way that would allow for the complex to emit
light of certain wavelength.
This gap affects how photons propagate through the material with
light of certain wavelength ranges being able to pass through while light in other ranges is reflected.
Not exact matches
Instead, researchers want to look at the effect
of magnetism on
certain wavelengths of infrared
light emitted by the corona.
Ordinary lasers work by bouncing
light between two mirrors, so photons
of a
certain wavelength accumulate.
Call up a fleet
of viruses that self - assemble into patterns that reflect only
certain wavelengths of light.
Most organisms» colors are produced by pigments that absorb
certain wavelengths of light, but not others, to create a color.
Pete Vukusic and Ian Hooper
of Exeter University in England studied the colored parts
of the swallowtail's wings and found that the scales that comprised them contain photonic crystals whose atoms are spaced so precisely that only
certain wavelengths of light can pass through.
Neuroscientists usually explain color illusions in mechanistic terms: They arise because
of the way cells in the retina and the brain respond to
certain wavelengths of light.
Astronomers have been telescopically studying Ceres for decades, using spectrometers to measure how
certain wavelengths of light are reflected or absorbed by substances on the surface.
Butterflies create color by selectively adding and deleting
certain wavelengths of light.
Water vapour in the atmosphere blocks
certain wavelengths of light.
As the quasar's
light zips through the Fermi bubble, carbon and silicon atoms in the gas absorb
certain wavelengths of ultraviolet
light.
Instead, it can absorb or emit
light only
of certain distinct
wavelengths, as the electron in it jumps from one quantized energy level to another — the fact that a century ago spurred the invention
of quantum mechanics.
One
of the prime explanations for this low reflectivity — an abundance
of minerals including the element iron, which strongly absorb
certain wavelengths of light falling upon them — doesn't fit in this instance, researchers say.
Over the same period, signs
of water ice —
certain wavelengths missing from the
light reflected back toward Earth — faded.
«
Light at
certain wavelengths can be absorbed out
of a thin optical waveguide by a microresonator — which is essentially a tiny glass sphere — when they are brought very close,» explained Gaurav Bahl, an assistant professor
of mechanical science and engineering at Illinois.
Moreover, because
of limitations inherent in their design, metamaterials
of this type designed for infrared and visible
wavelengths have, so far, been shown to impart a negative index
of refraction to
light that is traveling only in a
certain direction, making them hard to use for imaging and other applications that rely on refracted
light.
This could lead to materials that can change colors or patterns on command or block
certain wavelengths of light, while transmitting or amplifying others.
Through calculations and computer simulations, Atwater's team demonstrated that the trick to upping a material's thirst for
light is to create more «optical states» for the
light to occupy — which are like slots that can accept
light with a
certain wavelength, similar to the energy levels
of electrons in atoms.
As this
light courses toward Earth, it bumps into the interstellar atoms and molecules along the way, each
of which can block
certain wavelengths of light.
The possibility
of such cells has been debated at least since the 1950s, when researchers found single neurons in the visual cortex
of cats and other animals that respond to simple stimuli, such as lines oriented at a
certain angle or moving in a specific direction, or
light of a particular
wavelength.
For example, some
of these materials can channel
light around an object so that it appears invisible at a
certain wavelength.
Cone cells are specialized for
certain wavelengths of light to help animals detect color, while rods can detect even a single photon and are specialized for low -
light vision.
Cloud droplets absorb
certain wavelengths of light depending on their size, so noting which
wavelengths are missing in readings reveals the size
of the droplets present.
Spectrometers can be tuned to detect the
wavelengths at which scientists know a given element emits and absorbs
light; scientists can then determine the element's presence by whether it emits or absorbs
light of certain characteristic
wavelengths.
Planetary atmospheres can block
certain wavelengths of light, depending on what kind
of chemicals they contain, so the fact that one
wavelength of infrared radiation is blocked while another passes through can help astronomers understand that there's not only an atmosphere there, but also provide clues as to what it's made
of.
Because they propagate only in
certain directions, and with
wavelengths that are much smaller than that
of light in free space or standard waveguides, they could help to miniaturize optical devices for sensing and signal processing.
Optogenetics is the process
of exposing neurons to
certain wavelengths of light to stimulate or suppress their activity.
Light at certain specific wavelengths can be produced by gas molecules in these galaxies, and the wavelengths are stretched by the expansion of the Universe over the billions of years that it takes the light to reac
Light at
certain specific
wavelengths can be produced by gas molecules in these galaxies, and the
wavelengths are stretched by the expansion
of the Universe over the billions
of years that it takes the
light to reac
light to reach us.
The linear variable filters in the CLARIOstar ® have variable coatings along their lengths that can reject or pass
certain wavelengths of light.
There's structures inside the cells, inside the mitochondria that respond directly to
certain wavelengths of near infrared
light.
For the most part, vitamins are acquired when food is ingested, but some are acquired by other means: for example, microorganisms in the gut flora produce vitamin K and biotin; and one form
of vitamin D is synthesized in skin cells when they are exposed to a
certain wavelength of ultraviolet
light present in sunlight.
You also need exposure to
certain wavelengths of light in order for your metabolism to function optimally.
The addition
of certain chemicals to the atmosphere will destroy
wavelengths of light and it may only be a matter
of time before one
of these
wavelengths of light that is critical for human survival is eliminated.
Another way is from
certain wavelengths of the
light that are reflected back and get absorbed by greenhouse gases and warm the atmosphere (mostly water vapor, methane and tiny amounts
of CO2).
It has to do with
light of different
wavelengths (frequencies) that always moves in straight lines and stuff, hitting
certain obstacles on their ways, it has nothing to do with thermodynamics
The «a-ha» moment came from developing compounds that change color when they absorb a
certain wavelength of light but then will gradually disappear.