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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

Does the brightest color in the visible spectrum have the highest energy level?

Yes, the brightest color in the visible spectrum (violet) does have the highest energy level due to its shorter wavelength. Violet light has the highest frequency and carries more energy per photon compared to other colors in the visible spectrum.

How are different wavelengths of visible light transmitted by water?

When visible light enters water, shorter wavelengths (blue and violet) are absorbed and scattered more by water molecules than longer wavelengths (red and orange). This is why water appears blue as it absorbs the shorter blue wavelengths and reflects them back. Hence, longer wavelengths penetrate deeper into water, making red light the most visible at greater depths.

What is light classified as?

Light is an electromagnetic radiation. Our eyes are sensitive, the E/M radiation at the light wavelength. Hence we see light.

The E/M radiation adjacent to light are Infra-red(IR) and Ultra-violet(UV), which we do not see.

What do different colors of visible light represent?

Different colors of visible light have different wavelengths, with red light having the longest wavelength and violet light having the shortest. Each color of light corresponds to a specific range of wavelengths, with red having the longest wavelengths and violet having the shortest. Our eyes perceive these different wavelengths as different colors.

What are the six primary colors in the visible spectrum in order of decreasing wavelength?

The six primary colors in the visible spectrum, in order of decreasing wavelength, are red, orange, yellow, green, blue, and violet.

Why are ultraviolet waves and visible light waves measured in units of nanometers rather than meters or centimeters?

They are measured in terms of a smaller "unit value" to avoid constantly using the decimal or exponential values. That is, it is easier to compare wavelengths if they are expressed as integer values. A nanometer is just a convenient way of saying one-billionth of a meter.

Example : Humans can see wavelengths from about 390 to 750 nanometers ("visible light"), but birds can detect light farther into the ultraviolet range, 300 to 400 nanometers.

This is much simpler to compare than giving the values as 0.000000390 to .000000750 meters or as 3.9 x 10-7 to 7.5 x 10-7 meters.

To give a reverse analogy, you would not compare the distances between cities in terms of how many inches it was from one city to the next.

Why are more and more fire engines being painted yellow green instead of red?

If you see a blue fire truck (which would be a rare sight, at least in the US), it's because whoever owns it wanted it to be blue. Fire trucks are traditionally red, and that's a far more common color for them than blue is.

Visible light has a frequency range between 7 x 10 to the 4th power and 4 x 10 to the 4th power. Which frequency of light would have the most energy?

Those numbers are very inaccurate for visible light. But it doesn't matter. The rule is that the energy

carried by a photon of any electromagnetic radiation is proportional to its frequency.

The higher the frequency, the more energy it carries.

Is a beam a light from a flash light a geometric figure?

Yes, a beam of light from a flashlight can be thought of as a geometric figure. It can be represented as a straight line extending from the source in a particular direction. Thus, it has properties that can be associated with geometric figures, such as direction and length.

Is neon light natural light?

neon is a natural substance that is modified by man to glow. Neon is an "inert" gas which does not form any compounds. It is tenth in the periodic table. Neon means "new". It is used (at low pressure) in gas discharge lamps where an electric current through the gas causes it to glow red.

Is the human body transparent to the visible spectrum?

No, the human body is not transparent to the visible spectrum of light. Skin, muscles, and other tissues in the body absorb and scatter visible light, which is why we cannot see through the human body like we can with glass.

Why the light is important?

Light is important because it allows us to see and perceive the world around us. It plays a crucial role in regulating our sleep-wake cycle, mood, and overall well-being. Additionally, light is essential for photosynthesis in plants and provides energy for all living organisms.

All colors of visible light spectrum blended together results in what?

white light.... , The one that comes from the sun , light bulbs ... and that allows us to see.

The range of electromagnetic waves that human eyes can detect?

The range of electromagnetic waves that human eyes can detect is known as the visible spectrum, which includes wavelengths from approximately 400 to 700 nanometers. These wavelengths represent the colors of the rainbow, from violet to red. Beyond this range are ultraviolet and infrared waves, which are invisible to the human eye.

What wavelengths just a little higher than ultraviolet rays are called?

The next name of wavelengths longer than ultraviolet rays is "violet light".

What is CuNH34?

CuNH3Cl4 is the chemical formula for a complex ion containing copper, nitrogen, hydrogen, and chlorine atoms. It is not a commonly known compound and likely refers to a specific coordination compound used in a particular context or research study. The compound's properties would depend on the specific arrangement and coordination of the atoms within the complex ion.

What colors does the rainbow have?

The rainbow consists of the visible spectrum ranging from red, orange, yellow, green, blue, indigo, and violet.

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Answer #2:

The rainbow has ALL of the colors. Every shade of paint that was ever

mixed, every hue of fabric ever dyed, every highlight of hair, every color

that any human eye ever saw or is able to see, they're all in the rainbow.

Many have names, but most don't.

Visible light occupies which position in which part of the electromagnetic spectrum?

Visible light occupies the middle position in the electromagnetic spectrum, between infrared and ultraviolet radiation. This part of the spectrum is the only range of electromagnetic waves that can be detected by the human eye.

Which basic property determines a colored lights placement on the spectrum of visible light?

Most of the spectrum charts that I have seen are listed in wavelengths, particularly nanometers (nm). Where 1 nm = 1x10^-9 m.

Which color of the visible light portion of the electromagnetic spectrum has the highest frequency and the most energy?

Violet, with a wavelenght between 380 and 450 nm, which is near the end of the visible light, next to the ultraviolet region.

Be careful because talk about "colors" is quite dangerous. Firstly, different cultures has different names for the same color. In addition to this, due to the fact that the electromagnetic spectra is continuous (i.e., there are infinite's wavelenghts) it is impossible to say exactly which wavelenght is the limit of the visible region and, consequently, which is the color associate to this wavelenght.

Usually (but it is a convention) it is said that visible region is between 380 and 750 nm.

If you wanted to study a neutron star would you use a visible light telescope or an x ray telescope?

Mostly neutron stars are detected with radio telescopes. Some can actually be seen with optical telescopes, and these are all optical pulsars.

Neutron stars were discovered because they are radio sources. The first star known to be a neutron star was the Crab Nebula neutron star, or Crab Pulsar, which was discovered to be a neutron star because of its radio emissions in 1965. Its apparent magnitude is 16.5. This puts it beyond the abilities of most amateur telescopes.

Why do all large optical telescopes use mirrors to collect light rather than lenses?

Light goes through the lens but not through the mirror.

-- So any imperfection inside the lens can affect the behavior of the light, but an

imperfection inside the mirror can't.

-- So the lens must be made of the finest, purest material through and through,

but the mirror can be made of any material that can hold the shape of one surface ...

metal, granite, etc. The mirror doesn't even have to be glass.

-- Both surfaces of the lens must be accurately curved and polished, and they

must be perfectly parallel to each other. Only one surface of the mirror has to

be optically perfect in shape; the others can be pocked, dimpled, honeycombed,

scratched, drilled, chipped, etc.

-- The lens can only be supported by its edge, and must be rigid enough that no

part of it will bend or deform under its own weight, no matter what position it's

in. The mirror can be supported all around its sides and all over its back. It can

even be fitted with computerized plungers along its back, to push on it and

correct its shape if it sags or bends.

Why does light come from Jupiter?

Jupiter does not produce light. It does, however, reflect a lot of the sunlight that reaches it's surface. The amount of light that a planet's surface reflects is call it's albedo, and it's expressed as a value between 0 (nothing reflected) to 1 (100% of light is reflected). Jupiter has an albedo of 0.34, which may seem small compared to Venus's albedo of 0.9, but since Jupiter has a substantially larger surface area than Venus, what it lacks in reflectiveness it makes up for in size.