0
Visible Light Spectrum
Join us here to ask and answer questions on the "illuminating" topic of the visible light spectrum. This includes questions about: refraction, reflection, rainbows, prisms, mixing colored lights, and the spectrum of colors that make up white light.
1,220 Questions
Infrared imagery is a type of photography or technology that captures wavelengths of light not visible to the human eye. It is used to detect heat signatures, show temperature variances, identify objects obscured by darkness or foliage, and provide valuable information in scientific, military, and industrial applications.
Does a book absorb or reflect light?
A book typically reflects light due to its glossy or matte surface, depending on the type of paper and finish used. The reflective properties of the surface determine how much light is bounced off the book.
Does white poster board reflect all lights?
Generally, white poster board reflects most visible lights. However, it may not reflect all lights equally. Some colors or wavelengths of light may be absorbed or scattered more than others, resulting in a slight variation in reflection.
What observations indicate that visible light has a wavelength much shorter than a centimeter?
Answer #1:
The colored pattern seen in a soap bubble & The colored pattern seen
when light passes though a diffraction grating.
================================
Answer #2:
The fact that you can see small things ... and small details on big things ...
that measure much less than a centimeter. You can't see the edges of things
that are smaller than whatever you're using to explore them with.
As an analogy:
In principle, you could get a picture of the size and shape of your computer by
shooting small beans at it, and gathering data of which beans bounce off of it,
and in what direction they bounce. But you couldn't get the same picture by
shooting large beach-balls at it.
Limes are an acid-based material. Acids are capable to form ions which are electrically charged. With this in mind, we already have the electrical charges and we only need the conductor material to generate electrical current. A metal bar can be used. But we have the same potential on this bar, and this is why we need some potential to conduce the electrical charges. We can put zinc and aluminium plates in its extremes (inside the lime) which will generate the potential required. Then, we can put a weak-power light in series to the bar to light it up!
What waves are humans allowed to see in electromagnetic spectrum?
We're allowed to see anything we want to. Unfortunately, we only have equipment to
detect the visible light band with our eyes, and the heat band with our nerve-endings.
If there are waves of any other band in the room, we don't even know it.
What sensors primarily operate in the EM spectrum just below the range of visible light?
Sensors that primarily operate in the electromagnetic spectrum just below the range of visible light include infrared (IR) sensors. These sensors detect and measure infrared radiation, which has longer wavelengths than visible light. They are commonly used in applications such as night vision devices, remote temperature sensing, and proximity detection.
Which form of electromagnetic radiation has more energy than visible light waves have?
Ultraviolet (UV) radiation has more energy than visible light waves.
All travel at the same speed through a vacuum
How does the frequency of radio waves compare with the frequency of visible light?
The radio wave part of the spectrum is very wide. The extreme ends are, roughly,
- 15km ( used for communicating with submerged submarines)
- 1 mm ( used for research, and possibly for radar)
The visible spectrum covers only a 2:1 range of wavelengths. It is centred on the colour yellow, with a wavelength ~= 700nm.
The very shortest of the radio waves is about 1000 times as long as yellow light.
Can visible light travel faster in a vacuum than both xrays and radio waves?
No.
We call it the "speed of light", but it's also the speed of radio, X-rays, heat,
ultraviolet, microwave, gamma rays, etc, and all forms of electromagnetic radiation travel at the same speed, as long as they're in the same medium (vacuum or material substance).
Is Radio waves are shorter than waves of visible light?
Yes, radio waves have a longer wavelength than visible light. They are part of the electromagnetic spectrum.
Which has the highest frequency gamma rays X-rays visible light radio waves?
Almost. They are shorter than radio waves, and they are the next order up from radio waves, but they have different properties in terms of interaction with materials. So right idea, wrong classification.
See the Related Links.
What is the similarities between X-rays and visible light?
Both beams seem to have wave/particle duality.
------------------------------------------
If we consider in a simple way the think, a focus electron beam behave somehow like a light beam even if it is a particle beam. Thus diffraction figures can be observed on a screen if the electron beam passes through a very small gap.
The great difference is that the equivalent wavelength of the electron beam seems to be very small with respect to light beam. The observed wavelength of an electron beam depends on electrons energy, being in general of the order of 1 nm (one meter part out of one billion) while green light has a wavelength of the order of 540 nm.
If we look more in deep the phenomenon, in quantum mechanics both a light beam and an electron beam are particle beams, being photons the light particles. They are in any case particle that do not resemble small rigid balls, but having quite exotic properties, like generating interference and, in case of photons, to be at light speed in any possible situation.
The basic difference is that electrons are fermions, with spin equal to 0.5 and a finite rest mass, while photons are bosons, with zero spin and zero rest mass. This difference causes the macroscopic difference in their behaviours.
A stained glass window is a substance that transmits different what of light?
A stained glass window is a substance that transmits different colors oflight
How do the frequencies of infrared visible and ultraviolet light compare?
Visible light imagery only reveals what is reflected from the Earth's surface and atmosphere.
Infrared imagery detects the differences in thermal energy, which are used to map either cloud cover or surface temperatures. They allow meteorologists to determine the temperature of a cloud.
What they have in common:
Weather satellites used both of these equipment to observe the atmosphere.
What has longer wavelength radio waves or visible light?
Neither is nesesarily longer a wave can go on forever. Visible light is more reflective than infared light so it will last longer. If you are talking about wavelength, infared lights wavelength is longer.
What did James clerk maxwell prove about visible light?
That it is a part of the electromagnetic spectrum
Is there a material that is transparent to infrared radiation but opaque to visible light?
ICE. You are standing behind ICE wall. I can see you but I can not use a infrared camera for taking your photo. For that matter, ordinary glass does a pretty good job of blocking certain wavelengths of infrared.
