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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 it called when light that can travel through something?

Objects that allow most light to pass through are described as transparent. In contrast, translucent objects allow some light to pass through, but don't let you see objects. Opaque objects allow no light to pass through.

What are the colors of visible light in order?

Going from short wavelength light to long wavelength light, the order goes Red - Orange - Yellow - Green - Blue - Indigo - Violet (ROYGBIV)

Do radio waves visible light and x-rays have same frequency in vacuum?

No. The radio waves has got the lowest frequency, light waves has got in between frequency and the X-rays has got the highest frequency of the three types of waves.

No.

What are neon lights?

A light using two (or more) electrodes in a glass tube filled with a mixture of inert gases. The most common (and the source of the name) is neon gas, which produces a red light when ionized by current flow between the electrodes. Helium, argon, and xenon are used in the mixture to produce other colors. Sometimes neon lights have a tiny amount of tritium gas added because the radioactivity pre-ionizes a little of the inert gas making it easier to start current flow to ionize the rest of the gas and produce light.

One type of neon light used in older electronic equipment that displayed numbers called a Nixie tube typically had 12 electrodes in a cylindrical glass tube: one electrode was common, ten of the electrodes were shaped like the digits 0 to 9, and the last electrode was a decimal point.

Why are UV rays harmful to the skin compare to visible light?

because ultraviolet light is radiation lying in the ultraviolet range, with wave lengths shorter than light but longer than x rays, while visible light can be seen by the human eye so therefore can be avoided easier

What are The seven colour categories of visible light?

i think its the colors of the earth mixed together red, orange, yellow, green, blue, indigo, and violet.

What is just above visible light on electromagnetic spectrum?

As you increase frequency past violet light, to the region where

the eye no longer perceives it, you're in the "ultraviolet" region.

Is it posible for a fluorescent material to emit radiation the ultraviolet region after observing visible light explain?

not possible, as visible light photons have less energy and ultraviolet photons need more energy. Energy can neither be created nor be destroyed. So by conservation principle ultraviolet photon as they fall on fluorescent material could give out less energetic light photons, but the converse is not possible.

How does the wavelength of infrared compared with the wavelength of ultraviolet?

Infrared waves have lower frequency and longer wavelengths than X-rays.

They are both transverse waves, travel at the same speed in vacuum (3 x 108 ms-1) and do not require a material medium for their transmission.

Infrared is non-ionizing, x-rays are ionizing.

What kind of waves have a color of spectrum?

That would be the visible spectrum of light. The letters in the acronym stand for the colours, like the colours of the rainbow

Red

Orange

Yellow

Green

Blue

Indigo

Violet

Can visible light travel through space?

Light can travel through space. All the light that we get on the earth's surface; usually travels from the sun through space before it can reach here.

Radio waves microwaves and ultraviolet rays have longer wavelenghts then visible light?

Gamma rays and radio waves are both electromagnetic waves. Radio frequency waves are a lower frequency, so they have a longer wave length.

What does the wavelength of visible light waves correspond to?

The wavelength of visible light corresponds to roughly 380 to 750 millionths of a millimeter.

Any longer or shorter than that, and your eyes don't respond to the radiation.

Is interphase longer or shorter than mitosis?

Interphase is different from the division stages of meiosis and mitosis in that no division occurs at interphase. Activities that occur include increase in the size of the cell and DNA synthesis.

How can you tell with your eyes if two light waves have different frequencies?

We'd need a bit of information about the waves. If we knew the frequency, we'd know that the lower frequency wave had the greater (longer) wavelength. If we knew the period (the time for one cycle), we'd know that the one with the greater period would have the lower frequency and the greater (longer) wavelength. There might be some other things that would give us the answer, but we'd have to know what kind of wave we were dealing with. A mechanical wave like a wave on water or a sound wave? An electromagnetic wave? What was stated is true for all those waves.

What are the detectors of visible light waves?

Detectors of visible light waves include photodiodes, photomultiplier tubes, and charge-coupled devices (CCDs). These detectors work by converting incoming photons into an electrical signal that can be measured and analyzed. They are commonly used in cameras, sensors, and scientific instruments to detect and capture images or quantify light intensity.

What shows the characteristic colors of light given off by and element?

Elements don't 'emit' colour. Colours are made by varying wavelengths of the electromagnetic force. Substances absorb certain wavelengths and reflect others. Those that are reflected pertain to the colour that we see. My car's surface absorbs purple, green and yellow light but reflects red light therefore it looks red.

Which color of visible light has the lowest frequency?

The color red has the lowest frequency of the visible light - violet has the highest

Why heating coil does not emit visible light?

Put enough electrical energy into it and it surely will.

As objects heat they emit increasing amounts of Infrared; at a critical temperature atoms will start to produce a first order harmonic - i.e red light. With increasing energy, the statistical population of atoms emitting red light will increase until the object glows bright red.

Push in even more energy and you add a second order harmonic one musical fifth above red light - this light is green. Add to the red light and you now have orange. With increasing energy, the statistical population of atoms emitting both red and green light will then increase until the object is bright yellow.

Push in yet more energy and a third order harmonic is added; this is one musical octave above red; this light is blue. Eventually, you will be pushing in sufficient energy that the object glows brilliant white.

That's how a light bulb does it. However, a heater coil has been designed so that under normal operating conditions it will only produce Infrared

Why is visible light white?

The way color is viewed by the human eye is a spectrum of colors, Red, orange, yellow, green, blue, indago, Violet. Those are the only colors the human eye can see. By mixing colors you get others, teal, grey, pink so on and so forth. everything has a color to them as defined by humans. Water is blue because when a white light is shined on it the ony color it doesn't absorb is blue, it gets reflected and in turn makes it visible to the human eye. A white item absorbs all color making it appear white.

What is frequency of a satellite wave?

I never heard of a "satellite wave". If you mean the radio waves used by satellites for communication - well, like all radio waves used for such purposes, there is probably a large range of waves they can use.

What is the order of frequency of the visible light?

Most humans (their eyes, to be more specific) can detect wavelengths between roughly 390 nm to about 750 nm. That means that the frequency band is roughly 400 THz - 790 THz (Terahertz)

Waves' frequency and wavelength are connected by the relationship vw = λf

In other words, wave velocity equals wavelength multiplied by frequency. All EM waves travel at a speed which is equal to c.

In the case of EM radiation, we know that vw = c (speed of light, exactly 299,792458 m/s), therefore we can easily calculate the frequency. Of course, you have to convert the values in the first place.

Some animals can detect a wider range of wavelenghts.

Is the electromagnetic spectrum the same as visible light?

Visible light is PART of the electromagnetic spectrum... ... The Electromagnetic Spectrum encompasses everything from Gamma waves to Radio rays, and visible light sits slap bang in the middle of the two... ... The other radiation types of the electromagnetic spectrum are (from highest to lowest frequency - with their approximate wavelengths) : * Gamma (10-12m) * X-ray (10-10m) * ultravoilet (10-8m) * VISIBLE (0.5x10-6m) * Infra Red (10-5m) * Microwaves (10-2m) * Radio waves (103m)