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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 colour of the spectrum has the greatest wavelength?
The longest visible wavelength is that of the last color
you can see on the red end of the spectrum.
Is the visible light spectrum between radar waves and xrays?
No, the visible light spectrum falls between infrared and ultraviolet light on the electromagnetic spectrum. Radar waves have longer wavelengths than visible light, while X-rays have shorter wavelengths.
What are the differences between xray and visible light?
X-rays have shorter wavelengths and higher energy than visible light. X-rays are used for medical imaging as they can penetrate tissues, while visible light is used for photography due to its ability to capture color and detail. X-rays are ionizing radiation, meaning they can damage biological tissues, so they are used with caution.
Radio waves, visible light, infrared rays, and the waves that heat food in a microwave oven are forms of electromagnetic energy, due to varying wavelengths and frequencies. Ultraviolet rays and X-rays are forms of ionizing radiation, which have higher energy levels and can impact living tissue at the cellular level, making them potentially harmful in excess.
What are facts about visible light?
Light is a form of electromagnetic energy. Visible light ranges through all the colors of the rainbow - red, orange, yellow, green, blue and violet. Light is generally considered to be those wavelengths and also some wavelengths just below red (infrared or IR) and just above violet (ultraviolet or UV). Light has an energy associated with it, and the lowest energy light is at what is called the lower end of the spectrum, which is the red end. The higher energy light is at the higher end of the visible spectrum, the purple (or violet) end. Higher energy light has a higher frequency and a shorter wavelength than lower energy, which has a lower frequency and a longer wavelength. Light, because it is electromagnetic energy, is different from mechanical energy, like sound (which is mechanical energy). Light can travel through a vacuum. The speed of light in a vacuum is a constant, no matter what frame of reference the observer has, and that is exactly 299,792,458 meters per second (about 186,282.397 miles per second). A link is provided to the Wikipedia article on light in case you wish to do some additional reading. And there is always WikiAnswers for more questions.
It is part of the electromagnetic spectrum.
It has the characteristics of a wave and a particle.
The photon is the force carrier.
It travels about 300,000 kilometers per second.
It can be refracted, reflected or absorbed.
It's energy is used in photosynthesis and in our eyes.
It has pressure, this can be increased to make lasers, etc.
The SI unit of measure is the candela.
What happens to visible light when it strikes an object?
When visible light strikes an object, it can be absorbed, transmitted, or reflected. The color of the object is determined by which wavelengths of visible light are reflected back to our eyes. Objects that appear white reflect most of the visible light, while objects that appear black absorb most of the visible light.
Are the colors of the rainbow all the colors in the visible spectrum?
No, sunlight contains only three frequencies that appear together as white light
What is an example of visible light waves?
we are seeing visible light in the following circumstances:
When we see any color,
When see any object,
When we look into a flashlight or headlight beam,
When we are temporarily blinded by a camera flash,
When we watch a movie,
Everything that we see with our unaided eye.
Which color of visible light has the shortest wavelength blue yellow green or violet?
Violet light has the shortest wavelength among the colors listed. Its wavelength is shorter than that of blue, yellow, and green light.
Yes, the part of the electromagnetic spectrum that consists of waves with frequencies higher than those of visible light and lower than those of X-rays is known as ultraviolet (UV) radiation. UV radiation is commonly found in sunlight and is responsible for causing effects such as sunburn and skin damage.
What wavelength of visible light does a blue shirt reflect?
Anything that appears blue to your eye is radiating blue light, that is, wavelengths
around 450 to 500 nanometers. If the object isn't producing the light itself, then it's
being illuminated by some other source of light, and reflecting it.
Well, light has to be concentrated to be hot enough to cook food, kinda like using a magnifying glass to burn stuff, even though normal sunlight can't do it alone.
A2. And don't forget that microwave ovens typically have a power of about 1kW. A 1kW infrared lamp will heat up food pretty fast.
BUT the microwaves penetrate the food to the centre, where they vibrate the water molecule. Whereas you'd have to wait for an IR lamp's heat to be conducted to the centre which will take some time by conduction.
Microwaves are a lot more penetrating than visable light. It gets absorbed easier, wheras light reflects, etc.
Does visible light have a higher frequency then radio waves?
Definitely. The highest radio frequency is around 300 GHz, whereas
the lowest visible frequency is around 400,000 GHz.
What is longer human skin cell or the wavelength of visible light?
The wavelength of visible light is longer than a human skin cell. Visible light has wavelengths ranging from about 400 to 700 nanometers, while a human skin cell is typically around 30 micrometers in size.
What is the relationship between visible light spectrum and your sight?
Sight can only be possible in the presence of light. To be able to see an object, we either see the light which it emits, if it is a luminescent object, or the light which reflects off it, if it is a non luminescent surface.
The spreading effect when light passes through a prism and separates into different colors is called dispersion. This occurs because different wavelengths of light are refracted by different amounts as they pass through the prism, causing them to spread out into a spectrum.
How many visible hyperlinks are there?
There are currently 2 visible hyperlinks in this conversation.
How the speed of visible light compare with gamma rays when both speeds are measured in a vacuum?
Visible light and gamma rays are different parts of the full spectrum of light. Since they are really both just light, they travel at the same speed, the speed of light. 186,000 miles per second.
What color carries the least amount of energy?
red light has the least energy of any visible (to humans) color, and violet has the most energy. The amount of energy carried by light is directly proportional to its frequency; the higher the frequency, the more energetic the light is.
Is visible light a shorter or longer wavelength energy in this spectrum?
Shorter or longer than what ?
The wavelength of visible light is shorter than that of radio and heat, and longer
than the wavelength of X-ray and gamma radiation.
And the wavelength of green light is shorter than red light but longer than blue light.
Can visible light produce interference Fringes.Explain?
Yes, visible light can produce interference fringes when it passes through two closely spaced slits or a diffraction grating. This phenomenon, known as interference, occurs when light waves overlap and either reinforce or cancel each other out, leading to the observed pattern of fringes. The spacing of the fringes is determined by the wavelength of the light and the distance between the slits or grating.
Can a pickle light up a light bulb?
Yes, a pickle can light up a light bulb if it is used to complete an electrical circuit. Pickles contain electrolytes that can act as conductors of electricity, allowing them to power a simple circuit and light up a small light bulb.
What are the colours of visible light in ordrer?
ROYGBV: Red, orange, yellow, green, blue, violet.
Visible light consists of every color that can be perceived by the human eye, every
color that has ever been painted, and every color that has ever been named. there
are an infinite number of them.
Every frequency (wavelength) is a different "color". If you name two frequencies
within the visible range, then no matter how close together they are, I can always
name a different frequency that's in between your two.
School children learn to name seven colors in the rainbow. But if you look between
any two of those, you see many different shades.
Is a light of a flash light a ray of light?
Light is made up of light waves, which are different than normal waves because they do not need a medium, or a material to travel though. (Some examples of mediums are water, air, wood, metal...). Light waves come in different sizes, or wavelengths. Flashlights usually use incandescent light bulbs to produce light. Incandescent light bulbs produce light by heating a tungsten filament until it glows and gives off heat under the form of light waves.
That depends which way you are moving along the electromagnetic spectrum.
If you are moving from low to high frequency, then the last category before visible light is infrared radiation.
If you are moving from short to long wavelength, then the last category before visible light is ultraviolet radiation.
