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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

Is Marlboro red and Marlboro lights the same?

Marlboro Red and Marlboro Lights are not the same. Marlboro Red is a full-flavored cigarette with a higher tar and nicotine content, while Marlboro Lights are a lighter version with decreased tar and nicotine levels.

Why dont you observe a compton effect with visible light?

Photons propagating at frequencies in the visible light spectrum can knock out electrons from atoms, known as the photoelectric effect, if their energy is greater than the photoelectric work function for that atom. However, at the energies associated with the visible light frequencies, these new photoelectrons will absorb any excess energy of the initial photons and convert it to kinetic energy, meaning that the initial photons vanish. Obviously, if the photons are gone, they can't scatter. Increasing the intensity (brightening) of the photons will cause more electrons to be emitted, but it will not increase their energy since photon energy is a function of its frequency, not quantity.

Photons that retain energy after interacting with an electron via the photoelectric effect are said to undergo Compton scattering. Now, despite what everyone says, if a photon has any amount of energy greater than the applicable photoelectric work function, it can theoretically undergo Compton scattering. Yes, I'm implying that visible light can Compton scatter. However, the probability of Compton scattering at these energies is very low, not to mention these scattered photons would most likely loose all of their energy from all of the other various available atomic interactions before they could even escape the sample, which is a necessary component to measurement (something has to exist in order to be measured). Therefore, the effects of Compton scattering are negligible at visible light energies. In fact, they don't really start becoming noticeable until around energies of 100keV, which is around 105 times greater than the energies associated with visible light. These kinds of energies are associated with x-rays.

Less then a few present of the energy supplied to 100w lamp appears in the form of visible light What happens to rest of it What could be done to increase this percentage?

The remaining energy is radiated as heat. Making the filament hotter should increase the percentage of visible light. I believe some lamps (like halogen lamps) do this. But the real solution is to use other technologies - like fluorescent lights, or LEDs.

The remaining energy is radiated as heat. Making the filament hotter should increase the percentage of visible light. I believe some lamps (like halogen lamps) do this. But the real solution is to use other technologies - like fluorescent lights, or LEDs.

The remaining energy is radiated as heat. Making the filament hotter should increase the percentage of visible light. I believe some lamps (like halogen lamps) do this. But the real solution is to use other technologies - like fluorescent lights, or LEDs.

The remaining energy is radiated as heat. Making the filament hotter should increase the percentage of visible light. I believe some lamps (like halogen lamps) do this. But the real solution is to use other technologies - like fluorescent lights, or LEDs.

The temperature of the layer of gas that produces the visible light of the sun is about?

The temperature of the layer of gas that produces the visible light of the sun, known as the photosphere, is about 5,500 degrees Celsius or 9,932 degrees Fahrenheit. This high temperature is what gives the sun its characteristic yellowish-white glow.

What is the difference between visible light and electromagnetic radiation?

Light, electricity, and magnetism are manifestations of the same thing called electromagnetic radiation. The energy you see coming out of the computer screen you are using to read this page is made of fluctuating electric and magnetic energy fields. The electric and magnetic fields oscillate at right angles to each other and the combined wave moves in a direction perpendicular to both of the electric and magnetic field oscillations. This energy also comes in many forms that are not detectable with our eyes such as infrared (IR), radio, X-rays, ultraviolet (UV), and gamma rays. Visible light is just apart of the electromagnetic radiations. I don't think there is a difference.

What is the frequency range of visible light in nanometers?

the equation, c=fλ can be rearranged to find the wavelength - λ = c/f

Since visible light is an EM wave, its speed is 3x108 ms-1.
748 nanometers to meters is 748x10-9

So, wavelength can now be calculated: λ = 3x108 / 748x10-9

The temperature of the layer of gas that produces the visible light of the Sun is?

The temperature of the layer of gas that produces the visible light of the Sun is around 5,500 degrees Celsius (9,932 degrees Fahrenheit). This layer is called the photosphere and is the visible surface of the Sun. It emits light in the visible spectrum that we see.

Why are the photons that emerge from the Sun's surface visible-light photons and infrared-light photons rather than gamma-ray photons?

Photons do not come in different types like infared-photons etc. they are just the wavelength that the photons are at and nuclear fusion just happens to emit photons at a particular wavelength

What is the minimum wavelength in the visible light spectrum?

The minimum wavelength in the visible light spectrum is approximately 380 nanometers, which corresponds to the color violet.

Which part of the visible light has most energy?

The blue part of the spectrum has more energy than the red part.

Which wavelength of visible light bends the most when refracted by a prism?

When light passes through a prism, the angle of deviation of any light beam is inversely proportional to its wavelengh. Since, violet color has least wave length, it bends the most and the red bends the least.

Dhirender Sharma

The largest visible light telescopes are now all what?

The largest visible light telescopes are now all ground-based, such as the Keck Observatory in Hawaii or the Very Large Telescope in Chile. These telescopes provide high-resolution images and data of celestial objects in visible light.

X-ray can take pictures of your bones but visible light cannot explain why?

X rays are of a much higher energy than visible light, so they have more penetrating power. So they can easily penetrate tissue, but they penetrate bones less well, and most metals almost not at all.

What is visible in the sky as a fuzzy patch of light?

Comets, "nebulae", globular clusters, and galaxies could all fit that definition,

as could a naked-eye view of the milky way.

When are tetrads visible?

Tetrads are visible during prophase I of meiosis, which is the stage where homologous chromosomes pair up and exchange genetic material through a process called crossing over. Tetrads consist of two homologous chromosomes, each made up of two sister chromatids.

How does refraction create the colors of visible spectrum?

Refraction occurs when light waves change speed as they pass through different mediums, causing them to bend. This bending of light waves at different angles creates a spectrum of colors due to their varying wavelengths. The shorter wavelengths (violet and blue) bend more than the longer wavelengths (orange and red), resulting in the separation of colors seen in a rainbow or a prism.

A prism is a device that separates white light waves into the colors of visible light Which of the following processes allows a prism to work?

A prism separates white light into its different colors through the process of refraction. When light enters the prism, each color (wavelength) of the light is refracted by a different amount due to its unique wavelength, causing them to separate and create a spectrum of colors.

What energy does visible light have?

Typical light bulbs convert electrical energy into light and heat energy. The light (visible, IR and some UV) radiates away. Some we can see. The bulb heats up. This heat energy is radiated away and -- if it's not in a vacuum -- the heat is also carried away by convection.

Do radio waves microwaves and ultraviolet waves all have longer wavelength than visible light?

Radio and microwaves are longer than visible light. So are heat (infrared) waves.

Ultraviolet waves are shorter than visible light. So are X-rays and gamma rays.

Does Heat have shorter wavelengths than visible light?

No. Heat is infrared radiation ("infra" means "lower"). Lower frequency means longer wavelength.

All radiation is captured by antennas that resonate at the frequency of the radiation. The "antennas" for visible light are electrons that use the radiation to jump into excited states and cause optical neurons to fire. The "antennas" of heat (infrared) are bigger -- they are molecules that jiggle faster when the radiation hits them. That jiggling is heat.

What in a microscope uses a beam of visible light passing through one or more lenses to magnify an object?

No, a beam of electrons is used by an electron scanning microscope. A light microscope uses light waves either reflected off the surface of the object under study, or passed through the object from beneath. Some people might consider a light wave as a type of electron beam, but for the purposes of microscopy, the ESM is capable of far greater magnification than the LM.

Which photons have greater energy those associated with microwaves or those asociated with visible light?

Photons associated with visible light have greater energy than those associated with microwaves. Visible light photons have higher frequencies and shorter wavelengths, while microwave photons have lower frequencies and longer wavelengths. The energy of a photon is directly proportional to its frequency, so higher frequency photons carry more energy.

The colors of the visible spectrum can be measured in units of?

wavelength, frequency, and energy and a unit used is Angstrom meters with has a scale of 0>17500 being 0 a perfect black body that does not reflect light to a pure white body the closest being the frequency of the star Sirius 17500. or infra red to ultra-violet, we can only see between 3500>6500 Angstrom meters.

After absorbing ultraviolet light a mineral releases visible light rays has the property of what?

The ability of a mineral or substance to glow during and after exposure to ultraviolet light is called fluorescence. If it continues to glow after the ultraviolet light has been turned off the effect is called phosphorescence.

Starburst galaxies are especially bright in visible light ultraviolet light or infrared light?

Starburst galaxies are especially bright in infrared light because the high rate of star formation results in a lot of dust being heated up, which emits infrared light. This makes starburst galaxies stand out at these wavelengths compared to their normal counterparts.