Theoretically it cannot as destructive interference between incoherant wave trains occur (i.e. photons are released spontaneously)
That's monochromatic, coherent light. A well known source of such light is a laser.
What is more efficient a tungsten light or an incandescent light?
An incandescent light uses electric current passing through a wire with a high resistance to current flow. That makes the wire very hot and it glows, producing the light. A fluorescent light uses electricity to charge a gas in a tube. The charged gas glows, producing the light. For the same amount of light, more electricity is needed in an incandescent light than in a fluorescent light, but developing and building fluorescent lights required more advanced technology than did incandescent lights.
1. Incandescent light bulb 2. Halogen light bulb 3. Compact fluorescent light bulb 4. Light emitting diode (LED) 5. Mercury vapor light bulb 6. Neon light 7. High intensity discharge lamps 8. Carbon arc lamp 9. laser 10. kerosene lamp
High energy density. Low dispersion.
No. Laser light is coherent. Light bulb light is not.
The intensity of light from most light sources is inversely proportional to the square of the distance from the source. So the intensity two meters from an incandescent lamp is one quarter of the intensity at one meter, and at three meters from the lamp the intensity is one ninth of the intensity at one meter. Laser light ideally has the same intensity at any distance.
The incandescent electric light bulb was invented by Thomas A. Edison.
Coherent light (like a laser) is a single frequency. Polychromatic light is, by definiation, multiple frequencies and cannot be coherent.
An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light which produces light with a wire filament heated to a high temperature by an electric current passing through it, until it glows.
The name of the device that produces coherent light is LASER.
The name of the device that produces coherent light is LASER.
Coherent light is light in which the electric and magnetic fields are perfectly synchronized and oscillate in phase with each other. This results in a single wavelength and direction, allowing the light waves to constructively interfere and produce a uniform, focused beam. Laser light is an example of coherent light.
It is made of tungsten, a metal with a very high melting point.
Thomas Edison made the first operating incandescent light bulb. But in 1800, Humphrey Davy invented the electric light. It didn't last long, and was not a bulb, though. Arc lights later became popular, but again, were not in a bulb.
it made it so people can see in the dark.
To produce two coherent sources of light, you can use a laser to create a beam of light with a single frequency and direction. By splitting the laser beam into two using a beamsplitter, you can then generate two coherent sources of light that have the same frequency and phase relationship.