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Blu-Ray (blue light as opposed to the CD's red light)
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∙ 11y ago
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What light rays have the longest wavelength?
The longest wavelength photon I could find out about was in a maser (microwave version of a laser) which uses emission between two hyperfine levels of atomic hydrogen. This had a frequency of 1.4 GHz and a wavelength of 21cm.
What kind of electromagnetic wave does a CD player?
Digital Versatile Disc (DVD) uses 650nm wavelength laser diode light (part of the electromagnetic spectrum, in visable light section) which allows us to see it. CD uses 780nm wavelength, just outside of the electromagnetic spectrum, hence why we cannot 'see' it, only hear.
How is compound light microscopes different than an electron microscope?
A compound microscope uses several lenses. Pressumably it is designed to work with visible light. An electron microscope uses electrons instead of light; since electrons (typically at about a million volt) have a much shorter wavelength than light, they have a much better resolution.
How it is possible to use the beam of electron in microscope?
That depends on the microscope. A tunnelling microscope uses a "beam" of electrons as a detector - a charged ultra-sharp stylus tracks across a sample using the beam to sense distance to the sample and hence the micro-structure of the surface. In scanning microscopes, the image relies on the fact that electrons can be considered to be waves of very short wavelength. With decreasing wavelength, resolution is possible at increasing magnification - finer details are resolvable.
How are a laser beam and a flashlight beam alike and different?
A LASER, or Light Amplification by Simulated Emission of Radiation, and is made by causing a particular substance to emit photons, almost all of which are one wavelength. A flashlight, however, uses a light bulb, which emits light due to the filaments, and will spread out. Both, however, are forms of light.
Is night vision UV vision?
No. Night Vision equipment uses infra-red (IR) light, wavelengths of light longer (lower frequency) than visible light. Infra="below", red, or light below red light in the spectrum. UV stands for ultra (above)-violet, light that is above the violet light spectrum, so higher frequency=shorter wavelength.
What is a transmission electron microscope used for?
The transmission electron microscope operates on the same principle as the light microscope but uses electrons instead of light. What you can see with a light microscope is limited by the wavelength of light. Transmission electron microscopes use electrons as "light source" and their much lower wavelength makes it possible to get a resolution a thousand times better than with light microscope.
What can be viewed with a light microscope?
Anything that is smaller than the wavelength of light, thatmeans that it is smaller than light and therefore is not visible, at all, to know it exists an electron microscope must be used which captures a reflection of the object a scanning electron microscope uses a computer to make the image
Two characteristics give a DVD more storage than a CD?
The DVD uses a different laser with a smaller wavelength, not the long wavelength red laser that is used for CD's. I believe the DVD laser is in the ultraviolet spectrum. Anywho, the smaller laser allows the DVD to have smaller "bumps" (which is what the laser reads). Since they are smaller, more can fit onto a disk. Also, DVD's can be 2-layer. Twice the data.
What light rays have the longest wavelength?
The longest wavelength photon I could find out about was in a maser (microwave version of a laser) which uses emission between two hyperfine levels of atomic hydrogen. This had a frequency of 1.4 GHz and a wavelength of 21cm.
What type of microscope does not invert the image?
This is the electron microscope, which uses a beam of electrons instead of light.Electrons have a much shorter wavelength than visible light so they can separate points which are closer together than the light microscope can ie they have a better resolution and so can see more detail.
How did the compound light microscope get its name?
it uses light to help you see the object and it has more than on lensIt uses light to see, and it is compound because it uses more than 1 lens.
What is the difference between a LASER and a MASER?
MASER -Microwave Amplification by Stimulated Emission of Radiation.LASER - Light Amplification by Stimulated Emission of Radiation.With a LASER, we get uniform, coherent, monochromatic electromagnetic radiation of wave length in the visible and near visible range (1mm-10nm).MASERs use microwaves instead and the wavelength is longer (1mm to 1m).Since the energy of a photon can be calculated by Energy= h (Planks constant) x f (frequency) the energy in a MASER is less than that in a LASER all other things being the same.
Which photosynthetic will be least affected by shorter periods of daylight?
the Calvin cyclethe calvin cycle
What two characteristic give a DVD more storage capacity than a CD?
The DVD uses a red laser with a smaller wavelength, not the long wavelength red laser that is used for CDs. The shorter wavelength allows the beam to be more accurate. This accuracy means that more data can be stored on a DVD than a CD. Data can only be written on one side of a CD, but a DVD can be written on both sides depending on the type of DVD (for example, DVD-5) you have. For more information see the link below.
What is a transmission electron microscope used for diagnosis?
The transmission electron microscope operates on the same principle as the light microscope but uses electrons instead of light. What you can see with a light microscope is limited by the wavelength of light. Transmission electron microscopes use electrons as "light source" and their much lower wavelength makes it possible to get a resolution a thousand times better than with light microscope.
What kind of electromagnetic wave does a CD player?
Digital Versatile Disc (DVD) uses 650nm wavelength laser diode light (part of the electromagnetic spectrum, in visable light section) which allows us to see it. CD uses 780nm wavelength, just outside of the electromagnetic spectrum, hence why we cannot 'see' it, only hear.
