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The linear momentum of light is very small to begin with. There's no reason
that it should increase with time, regardless of the source.
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∙ 12y ago
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Why can laser light can never be white light?
You may be correct in inferring that you are unable to purchase a simplistic white laser pointer, however white laser lights do exist in the scientific community for research.Before I go into detail, the reason why white lasers are fairly uncommon, especially in a commercially available laser pointer form is due to the construction of the regular laser pointer. You must understand that white light consists of a large variation of different wavelengths of light including the blue, red and green wavelengths all mixed together. The individual colors are restricted to a small range of wavelengths, such as blue, red or green.Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Light of a specific wavelength that passes through the gain medium is amplified (increases in power); the surrounding mirrors ensure that most of the light makes many passes through the gain medium, being amplified repeatedly. Part of the light that is between the mirrors (that is, within the cavity) passes through the partially transparent mirror and escapes as a beam of light. Most practical lasers contain additional elements that affect properties such as the wavelength of the emitted light and the shape of the beam. In short, laser light is most easily made when restricted to a specific wavelength, hence giving it its characteristic color, such as a blue, red or green laser.Now, typically, lasers are thought of as only emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The laser type you may be interested in is the Ion Laser. An Ion Laser is a gas laser which uses an ionized gas as its lasing medium. Like other gas lasers, ion lasers feature a sealed cavity containing the laser medium and mirrors forming a Fabry-Perot resonator. Unlike normal gas lasers, the energy level transitions that contribute to laser action come from ions. A mix of argon and krypton can result in a laser with output wavelength appearing as a brilliant white laser light.Because of the large amount of energy required to excite the ionic transitions used in ion lasers, the required current is much greater, and as a result all but the smallest ion lasers are water cooled. A small air cooled ion laser might produce, for example, 130mW of light with a tube current of 10A @ 105V. This is a total power draw over 1 kW, which translates into a large amount of heat which must be dissipated. It is therefore easy to see why such a laser would not be easily commercially available as well as compact enough to fit into a laser pointer size, since it requires a cooling system and powerful energy source.
If an object is thrown does it gain momentum or lose momentum?
It depends at what time in the throw your talking about. In the beginning it gains momentum, then in the middle it starts to lose momentum then in the end it loses all momentum.
Does an object gain momentum when it speeds up?
Yes The equation for momentum is mass x velocity So if you increase velocity the momentum increases
How can a supertanker have a huge momentum when it moves relatively slow?
When you gain speed, you also gain momentum, and that's why it takes a longer amount of time to stop or speed up.
Candidate strategy in the early presidential nominating contests is designed chiefly to gain?
To gain momentum
At what points does a roller coaster gain acceleration?
okay they gain their momentum from the launch point take the hulk for example it gains a great amount of acceleration from the launch. and that momentum goes on through the ride. manta however gains its momentum through the pretzal loop.
What is Threshold Current density in semiconductor laser?
It's the current you have to inject into the device so that the gain inside it is equal to the losses due to absorption and scattering of the light generated. When you have reached this amount of gain, then lasing can start to occur.
What is active medium in laser?
Lasing medium also called the gain medium is the active medium in the laser.
The momentum of a bowling ball decreases by 0.5 kg meters per second when it hits some pins How much momentum did the pins gain Explain?
0.5 kg m/s by the law of conservation of momentum
Why does a skateboard go faster on a steep hill?
its not exactly the skate board. Its how you use your momentum. Even if you do not use momentum gravity will pull u faster down a steep ramp.
When a gun is firesit recoils why?
Because linear momentum is conserved. Before the shot, the momentum of (gun + bullet) is zero, so it has to be zero after the shot. The bullet gains forward momentum when fired, so the gun must gain reverse momentum in order to maintain the zero sum.
What is the principle working construction of junction laser?
the junction lasers principle is like a normal laser but a specific junction will activate it. This is good because if you are away from the where the laser is then you can activate it without being there.
