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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

What is blueshift?

Blueshift is a phenomenon in which the wavelengths of light emitted by an object moving towards an observer are compressed, causing the light to appear shifted towards the blue end of the spectrum. This effect is a result of the Doppler effect and is commonly observed in astronomy when analyzing the motion of astronomical objects.

What instrument breaks a star's light into a spectrum?

A spectroscope is an instrument that breaks a star's light into a spectrum. This device allows scientists to analyze the different wavelengths of light emitted by stars, providing valuable information about their chemical composition and temperature.

Visible light and other waves of energy are forms of?

Visible light and other waves are part of the electromagnetic spectrum. These waves unlike sound waves can travel through vacuums and do so at c (3x10^8 m/s). The spectrum is very broad and includes microwaves, ultraviolet , x-rays, and our own visible light spectrum. These waves are differentiated based on their frequency but all contain photons, mass-less charge-less particles, hence the dual nature of light (light and other waves behave both as particles and waves, confusing i know :P)

basically what this means is that the only difference between visible light, x-rays, and microwaves is the frequency of the photon wave.

What are the risks of visible light?

Exposure to excessive visible light can lead to digital eye strain, which may cause symptoms like headaches, fatigue, and dry eyes. Prolonged exposure to blue light, a component of visible light, may disrupt sleep patterns by suppressing the production of melatonin. Over time, exposure to ultraviolet (UV) light, another component of visible light, can damage skin cells and increase the risk of skin cancer.

Are visible panty lines a turn on?

Preferences vary widely, but some may find visible panty lines to be a turn on as it adds an element of anticipation and suggestiveness. However, others may find them distracting or unappealing. It ultimately depends on individual preferences and comfort levels.

How many colors are in the visible spectrum of light?

In science class you're usually taught 7: red, orange, yellow, green, blue, indigo, and violet.

In my opinion, "indigo" is not really a color, it's just "that part of the spectrum where we're not quite sure if it's blue or violet." Cyan is a much more distinct color than indigo is.

Beyond that, it's really a matter of where do you stop counting. I could see a case for six (the listed ones minus indigo) or eight (the listed ones plus cyan).

The eye is capable of distinguishing perhaps ten million colors, but some of those don't appear in the spectrum (brown, pink, dark green, magenta). I don't think anyone has ever bothered to enumerate how many distinct (in the sense that a person could say "A is not the same color as B", not in the sense of having actual names as opposed to "greenish-yellow, but a little more yellowish than that last one") colors appear in the spectrum

What is Visible light only a small portion of?

Visible light is only a small portion of the electromagnetic spectrum, which includes a wide range of wavelengths such as radio waves, microwaves, infrared, ultraviolet, X-rays, and gamma rays.

The energy of visible light transported by electromagnetic waves are what type of waves?

Visible light is a type of electromagnetic wave that carries energy through oscillating electric and magnetic fields. It falls within a specific range of wavelengths in the electromagnetic spectrum that can be detected by the human eye.

Which fruit lights a light bulb more a lemon or grape?

A lemon can light a small LED light more effectively than a grape, as it has higher acidity levels that can trigger a chemical reaction with zinc and copper electrodes to generate a small electric current. Grapes have lower acidity and moisture content, making them less effective in producing enough energy to light a bulb.

What happens if you shine a beam of light into a triangular prism?

When a beam of light is shone into a triangular prism, the light is refracted (bent) as it enters the prism, then reflected internally off the prism's surfaces, and finally refracted again as it exits the prism. This interaction between the light and the prism causes the light to separate into its component colors, creating a rainbow spectrum.

Compared to visible light ultraviolet radiation is more harmful to human skin and eyes because ultraviolet radiation has a?

shorter wavelength and higher energy, allowing it to penetrate deeper into the skin and cause damage to cells, including DNA. This can increase the risk of skin cancer and other health issues. Additionally, UV light can also damage the cornea and lens of the eye, leading to conditions such as cataracts.

Why does cytochrome c absorb uv and visible light?

Cytochrome c contains heme groups which can absorb UV and visible light due to the presence of conjugated double bonds in the heme structure. When light is absorbed, electrons in the heme group are excited to higher energy levels, leading to characteristic absorption peaks in the UV-Vis spectrum.

What is pure spectrum?

Pure spectrum refers to a light source that emits radiation over a narrow range of wavelengths, without any additional colors or frequencies present. This can be ideal for certain scientific experiments, such as spectroscopy, where precise wavelengths of light are needed for analyzing materials. Pure spectrum sources can include lasers or specially designed filters to achieve the narrow wavelength range.

What are the colors in the light spectrum?

The colors in the light spectrum are in the following order: Red, Orange, Yellow,

Green, Blue, Indigo, and Violet.

A good way to remember the order is by remembering that R.O.Y G. B.I.V (Roy G Biv)

colored in the rainbow.

(Note: Maroon, burgundy, mauve, peach, fuschia, beige, tan, olive, teal, and cream

are imaginary and do not exist. There are only the seven colors listed above.)

Danger visible light has to living things?

Visible light does have little danger, because if your skin is exposed to it for too long than you can get a sunburn it can eventually cause skin cancer

skyelerr

It is visible light but a certain type of visual light, UV waves are the ones that get you sunburned and skin cancer, if you stood under a light bulb all day it wouldn't hurt you unless you look at the light bulb directly.

Can you light a light bulb by holding a copper tube and a steel tube wired to a light bulb?

Yes, you can create a simple battery by holding a copper tube and a steel tube in an acidic solution like lemon juice, which will generate a small electric current. By wiring this to a light bulb, you can light it up. This experiment demonstrates the principles of making a battery using dissimilar metals.

How much of the electromagnetic spectrum is occupied by visible light?

Visible light occupies a small portion of the electromagnetic spectrum, specifically wavelengths between approximately 400-700 nanometers. This range corresponds to the colors we see in a rainbow, from violet to red.

What does light do?

Light is a form of electromagnetic radiation that allows us to see objects by reflecting off of them. It also provides energy to living organisms through processes like photosynthesis in plants. Additionally, light plays a crucial role in the regulation of biological processes such as circadian rhythms.

In the electromagnetic spectrum what is the radiation on either side of visible light?

Ultraviolet radiation lies on the shorter-wavelength side of visible light, while infrared radiation lies on the longer-wavelength side. Ultraviolet has higher energy and shorter wavelengths than visible light, while infrared has lower energy and longer wavelengths.

Why can you see visible light waves but not other electromagnetic waves?

Visible light consists of the band of wavelengths to which the structure of the human

eye is sensitive. Radiation outside of that band may enter the eye, but there's nothing

in there that responds to it, so the brain remains unaware of it.

The spectra of most galaxies show redshifts this means that their spectral lines are what?

The spectral lines of galaxies are redshifted, indicating that they are moving away from Earth. This redshift is typically a result of the expansion of the universe, causing galaxies to move further apart.

Is Long wavelength visible light have a speed that is slower than short wavelength light?

No. The speed of light is the same for long wave and short wave light. c=fw where w is the wavelength and f is the frequency. The speed c is a constant. The frequency is different for different wavelengths. High frequency for short waves and low frequency for long waves.

What is the range of wavelengths for violet light?

As stated earlier:

Violet light: 380-450 nm

Red light: 620-750 nm

nm=nanometer=10-9 meter

The colors of the visible spectrum from highest to lowest engergy level?

The colors of the visible spectrum from highest to lowest energy level are: violet, blue, green, yellow, orange, and red. Violet has the highest energy level, and red has the lowest energy level among the visible colors.

Curved glass that bends light rays?

Curved glass bends light rays due to refraction, where the change in speed of light as it passes from air to the glass causes it to change direction. The curvature of the glass surface also plays a role in how the light is refracted, which can be used in technologies like lenses and curved displays to manipulate the path of light.