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What is the wavelength of the light produced by the lasers in CD drives?
Wiki User
∙ 8y ago
Originally, CD lasers with a wavelength of 780 nm were used, in the infrared.
For DVDs, the wavelength was reduced to 650 nm (red color), and the wavelength
for Blu-ray Disc was reduced to 405 nm (violet color).
Wiki User
∙ 8y ago
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How do you produce a coherent wave?
Coherent waves in the electromagnetic spectrum are produced by masers, for microwaves, and lasers, for light.
What is the wavelength of sunlight?
Sunlight, which for the moment we'll consider to be visible white-colored light, is actually made up of many, many different wavelengths (colors) of light. Yes, a wavelength of light corresponds to its color, and a mixture of all the visible colors of light produces white light.How do we know? The fact that white light is actually a mixture of colors (and therefore, wavelengths) is demonstrated when we pass white light through a prism. The prism splits the white light into the component colors, which shine in separate bands of color as the light exits the prism.Blue light is a shorter wavelength, green and yellow are medium wavelengths, and red light is a longer wavelength. Ultraviolet, which is invisible, is very short wavelength light, while infrared, also invisible, is very long wavelength light. Sunlight contains these invisible lights as well as the visible colored lights.Answer:The color and wavelength of light that is produced is determined by what element produces it. The sun produces a lot of the group 18 (noble gases) elements so if you want to find the wavelength of sunlight you would have to measure the wavelengths of some of the Noble gases, UV radiation, and other forms of electromagnatic radiation.***************Actually, the second answer given is only partially correct. Light can be produced in a few different ways. If light is produced by changes in electron orbitals within an element (photoelectric effect), as happens in fluorescent lights, LEDs, lasers, or gas lamps etc., then indeed the wavelength of light is determined by the element and is thus restricted to a few discreet values.However, light can also be produced by 'blackbody radiation'. This is associated with hot objects - incandescent light bulbs, metal glowing when hot, even the infrared light emitted by human bodies. When light is produced in this way, it emits a continuous spectrum, meaning that many different wavelengths are produced, not just a few. The peak (strongest) wavelength will be determined by temperature alone, from an equation called 'Wien's law'.Both kinds of light are generated by the sun, but the blackbody radiation is much more powerful due to the high temperature of the sun. The surface of the sun is approximately 6000 degrees Kelvin, which means that the peak wavelength emitted by the sun is about 483 nm.This wavelength is in the middle of the visible range of colors. A coincidence? Not at all! Our eyes have evolved to be most sensitive to the colors that are most generated by the sun.For more information, see the related links below.
Is UV light emitted from all lasers?
No, most lasers emit light at a different frequency than UV.
What color of visible light has the longest wavelength?
Red is the longest wavelength of visible light
Which type of visible light has the longest wavelength?
The longest wavelength / lowest frequency visible light is the red end of the spectrum. The shortest wavelength / highest frequency visible light is the violet end of the spectrum.
Do lasers olways give off light that is always red?
no, it depends on the wavelength
Difference between normal light and laser light ray?
white light is the full visible like spectrum. lasers are monochromatic. a single or very narrow frequency or wavelength.
How do laser range finders use lasers?
Distance is measured based on the Doppler effect. This has to do with a phase change in the the light based on its wavelength
How do you produce a coherent wave?
Coherent waves in the electromagnetic spectrum are produced by masers, for microwaves, and lasers, for light.
How do CO2 lasers work?
A CO2 laser works by running electricity through gas to produce light. The beam of light produced is emitted through a transparent mirror. It is one of the most powerful lasers in production.
Why are lasers different from other kinds of light?
Because laser light is highly coherent: all one wavelength with all the peaks aligned (all waves completely in phase). Ordinary light is not coherent.
Why are CD-ROM and DVD drives called optical drives?
It is called an optical drive because the mechanism for reading and writing information is optical (light) based - it uses lasers.
What is the wavelength of sunlight?
Sunlight, which for the moment we'll consider to be visible white-colored light, is actually made up of many, many different wavelengths (colors) of light. Yes, a wavelength of light corresponds to its color, and a mixture of all the visible colors of light produces white light.How do we know? The fact that white light is actually a mixture of colors (and therefore, wavelengths) is demonstrated when we pass white light through a prism. The prism splits the white light into the component colors, which shine in separate bands of color as the light exits the prism.Blue light is a shorter wavelength, green and yellow are medium wavelengths, and red light is a longer wavelength. Ultraviolet, which is invisible, is very short wavelength light, while infrared, also invisible, is very long wavelength light. Sunlight contains these invisible lights as well as the visible colored lights.Answer:The color and wavelength of light that is produced is determined by what element produces it. The sun produces a lot of the group 18 (noble gases) elements so if you want to find the wavelength of sunlight you would have to measure the wavelengths of some of the Noble gases, UV radiation, and other forms of electromagnatic radiation.***************Actually, the second answer given is only partially correct. Light can be produced in a few different ways. If light is produced by changes in electron orbitals within an element (photoelectric effect), as happens in fluorescent lights, LEDs, lasers, or gas lamps etc., then indeed the wavelength of light is determined by the element and is thus restricted to a few discreet values.However, light can also be produced by 'blackbody radiation'. This is associated with hot objects - incandescent light bulbs, metal glowing when hot, even the infrared light emitted by human bodies. When light is produced in this way, it emits a continuous spectrum, meaning that many different wavelengths are produced, not just a few. The peak (strongest) wavelength will be determined by temperature alone, from an equation called 'Wien's law'.Both kinds of light are generated by the sun, but the blackbody radiation is much more powerful due to the high temperature of the sun. The surface of the sun is approximately 6000 degrees Kelvin, which means that the peak wavelength emitted by the sun is about 483 nm.This wavelength is in the middle of the visible range of colors. A coincidence? Not at all! Our eyes have evolved to be most sensitive to the colors that are most generated by the sun.For more information, see the related links below.
What is wavelength of sunlight?
Sunlight, which for the moment we'll consider to be visible white-colored light, is actually made up of many, many different wavelengths (colors) of light. Yes, a wavelength of light corresponds to its color, and a mixture of all the visible colors of light produces white light.How do we know? The fact that white light is actually a mixture of colors (and therefore, wavelengths) is demonstrated when we pass white light through a prism. The prism splits the white light into the component colors, which shine in separate bands of color as the light exits the prism.Blue light is a shorter wavelength, green and yellow are medium wavelengths, and red light is a longer wavelength. Ultraviolet, which is invisible, is very short wavelength light, while infrared, also invisible, is very long wavelength light. Sunlight contains these invisible lights as well as the visible colored lights.Answer:The color and wavelength of light that is produced is determined by what element produces it. The sun produces a lot of the group 18 (noble gases) elements so if you want to find the wavelength of sunlight you would have to measure the wavelengths of some of the Noble gases, UV radiation, and other forms of electromagnatic radiation.***************Actually, the second answer given is only partially correct. Light can be produced in a few different ways. If light is produced by changes in electron orbitals within an element (photoelectric effect), as happens in fluorescent lights, LEDs, lasers, or gas lamps etc., then indeed the wavelength of light is determined by the element and is thus restricted to a few discreet values.However, light can also be produced by 'blackbody radiation'. This is associated with hot objects - incandescent light bulbs, metal glowing when hot, even the infrared light emitted by human bodies. When light is produced in this way, it emits a continuous spectrum, meaning that many different wavelengths are produced, not just a few. The peak (strongest) wavelength will be determined by temperature alone, from an equation called 'Wien's law'.Both kinds of light are generated by the sun, but the blackbody radiation is much more powerful due to the high temperature of the sun. The surface of the sun is approximately 6000 degrees Kelvin, which means that the peak wavelength emitted by the sun is about 483 nm.This wavelength is in the middle of the visible range of colors. A coincidence? Not at all! Our eyes have evolved to be most sensitive to the colors that are most generated by the sun.For more information, see the related links below.
What do lasers emit?
Lasers emit light, high intensity light that only faces one way (the direction the light is pointed at). cheap lasers are less accurate when it comes to shining light on one spot.
Do lasers emit monochromatic light?
Yes, lasers emit coherent monochromatic light due to the process which light is created. It is created by exciting molecules continuously to one energy level and emitting the energy back to a sort of chain effect as the emitted light is partially used to excite more molecules, therefore due to the specific energy level changes in the excited medium, the light emitted is of one specific wavelength.
Do lasers emit gamma rays?
No. Lasers produce coherent light.
