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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

The interstellar medium is approximately 99 percent gas and 1 percent dust Why is it the dust and not the gas that blocks your visible-light view of the galactic center?

Dust grains are better at scattering and absorbing visible light compared to gas molecules. The dust particles are larger and denser, causing them to block and scatter light effectively, making them more significant in obstructing visibility in the interstellar medium compared to the gas.

How does the speed of visible light compare with the speed of gamma rays when both speeds are measured in a vacuum?

The speed of light in glass is the reciprocal of the refractive index of the glass or 1/(refractive index). Not all glass is the same: its refractive index can range from less than 1.5 for Pyrex (a borosilicate glass) to more than 1.9 for (impure) flint glass. This means the speed of light in glass can range between 0.52 and 0.68 of its speed in vacuum.

What is the longest wavelength of visible light?

The longest wavelengths visible to the average human being are in the range of ~700 nanometers which appears to be red to the human eye.

However, I am capable of perceiving the red light that my 2 Logitech cordless laser mice emit at 848 nanometers. I hope I am not damaging my eyesight, but I don't believe the emission spectrum for such a laser would be very wide, so I would bet that 800-820 nm is still in the visible range, at least for younger people. I am 22 years old.

the longest wavelengths of visible are red colored

What type of nuclear radiation is most closely related to visible light?

Gamma radiation is most closely related to visible light. They both are forms of electromagnetic radiation, with gamma radiation having the shortest wavelengths and highest energies among all types of nuclear radiation.

Why red is the most visible color?

The color red is the longest wavelength in the visible light spectrum because the less energy a wave carries the longer the wavelength and red carries the least energy of all the colors in the visible spectrum

What are the uses of light?

Light has many uses, including providing illumination for visibility, as a source of energy in photosynthesis for plants, in communication technologies such as optical fibers, and in medical applications like laser surgery and phototherapy.

What is the frequency range of visible light?

It ranges from 4.28 x 1014 Hz for red light to 7.89 x 1014 Hz for violet light.

Dangers of visible light?

Exposure to high-intensity visible light, such as from the sun or artificial sources, can potentially cause damage to the eyes, leading to conditions like photokeratitis or photoconjunctivitis. Prolonged exposure to blue light, a component of visible light, especially from screens, may also disrupt sleep patterns and cause digital eye strain. Additionally, visible light can contribute to skin aging and pigmentation.

Which color in the visible spectrum has the shortest wavelength?

The shortest wavelength of visible light for your eye is the wavelength of the last

color you can see on the blue end of the rainbow. It may be slightly different for

someone else's eye.

Wavelength of electrons are what percent visible in the white light?

The wavelength of electrons is about 10,000 times shorter than the wavelength of visible light. This means that electrons are not visible in white light as their wavelengths are outside the visible spectrum.

What is a picture called formed by light?

Every imaginable picture that is visible is formed by light, but you may be referring to photographs, relatively permanent images made by exposing photo-sensitive emulsions or surfaces to focused light.

What is a powerful concentrated light known as?

A powerful concentrated light is known as a laser. Lasers produce a focused beam of light that can be used for various applications such as cutting, welding, surgery, and communication.

What is the duality theory of light?

It's typically called the "Wave-particle duality". And it's easily demonstrated, so

it's not "just a theory".

If you set up an experiment that will produce results from a wave but not from a

stream of particles, a beam of light produces results. So light behaves like a wave.

If you set up an experiment that will produce results from a stream of particles

but not from a wave, a beam of light produces results. So light behaves like a

stream of particles.

Whichever one you look for ... waves or particles ... light behaves that way.

So, next time someone asks you "Is light a wave or a stream of particles ?",

you can answer him confidently, knowing that your answer is the correct one.

The correct answer is "Yes ".

Identify two sources of white light?

The two sources of white light are:

*visible light

*The Sun.

The shortest wavelengths of visible light are?

The shortest wavelengths of visible light are violet light, which typically has a wavelength range of about 380-450 nanometers. This corresponds to the highest frequency and energy within the visible spectrum.

How do plants use visible light in photosynthesis?

Plants use visible light in photosynthesis by absorbing it through pigments like chlorophyll in their chloroplasts. This light energy is then converted into chemical energy in the form of glucose, through a series of biochemical reactions, which serves as fuel for the plant's growth and development.

Does artificial light travel as fast as natural light?

The radiation that a laser emits ... whether it's visible light, infrared, or microwave,

has all the same physical characteristics as electromagnetic radiation from other

sources has, including speed.

The shorter the wavelength of visible light means what?

The shorter the wavelength of visible light, the higher the frequency and the greater the energy of the photons.

What portions of the visible spectrum benefit photosynthesis the most?

Energy with shorter weve lengths, such as ultra violet, has higher energy levels than those with longer wave lengths, such as infrareds.

So, I assume the portions of the visible spectrum with shorter wave lengths benefit photosynthesis the most.

During photosynthesis visible light has enough energy to?

During photosynthesis, visible light has enough energy to excite electrons in chlorophyll molecules within the chloroplasts of plant cells. This excitation of electrons allows them to undergo a series of reactions that eventually produce ATP and NADPH, which are essential for the synthesis of glucose and other organic compounds.

What colors of the visible light spectrum are absorbed by black objects White objects?

The color of something actually depends on the wavelengths of colors reflected from the objects chosen. For instance, a red apple is red because of the red wavelengths in white light get reflected, while others are absorbed. Actually, if a red apple were to be illuminated by light, the apple would have a black appearance. Now back to the point, when light is absorbed by a black object, the energy of the object carried by When light is absorbed by a black object, the energy carried by the light doesn't just disappear like that. Instead, it raises energy of the object causing the absorption. The object carries the absorbed energy by emitting much longer wavelength, with lower energy infrared (heat). This process of light into heat is like a key to understanding the process. Light doesn't just disappear when struck onto a black object. It's actually transformed into some other species of radiation that could be either radiated from or retained into the black object.

What are the Krypton visible spectrum wavelengths?

The visible spectrum wavelengths of Krypton fall in the range of approximately 440 to 740 nanometers. This corresponds to the blue to red part of the visible light spectrum.