Lasers and Color light

Lasers
The amount of energy light can impact is wavelength (color for visible light) dependent. Look up the Photoelectric Effect for more details. The power, wavelength and spectral width of a laser is controlled by its physical design. Black light is just light on the violet end of the spectrum (UV) and it's anything special other than you can make some really cool posters that reflect those wavelengths.

E=h*nu

E is energy, h is Planck's constant, and nu is frequency.

Lazars are coherent electromagnetic emissions. Coherent meaning all emissions are of a single frequency and in-phase (look up the properties of a wave).

The frequency of light determines color or even visibility, for that matter, as some lazars are infrared and x-ray and aren't visible. Radio frequency lazars also exist and are very low frequencies and energy.

Black light is deep violet. The energy of visible light energy is in the direction of ROY G BIV (Red Orange Yellow Green Blue Indigo Violet). So Black Light is energetic but still visible light.

Rap

Will a red laser effect sometnig differently than a blure laser or a green one?

For the laser to have an effect, the object being irradiated needs to absorb radiation in the frequency/wavelength range that the laser is emitting. The effect of the laser will then depend on how the irradiated object dissipates its absorbed radiation--options may include heat, chemical reaction, fluorescence, etc.
For example: many dental composites consist of methacrylate resins containing a "photoinitiator" called camphorquinone (CPQ). CPQ absorbs blue light, in the wavelength range of ~400 - ~510 nm. If you irradiate a dental composite with a red laser, nothing will happen. If you irradiate it with a blue laser, however, the CPQ will produce free radicals that cause the composite to "cure", or go from a viscous resin to a solid polymer. (Lasers aren't typically used for this purpose; rather, most dentists use light emitting diodes with an emission maximum at ~470 nm, which corresponds nicely with CPQ's absorbance max.)

What about lasers in other colors of the visible spectrum? The red lasers that they "use" to melt things or burn holes in is just a myth?

Light travels at a universal constant speed through medium when relativity holds sway (i.e disregard black holes, worm holes and cosmic strings) - regardless of colour!

Blue shifted light has a higher energy content than red shifted light at any intensity level.

Take a large enough energy source, direct it into a laser and you'd zap anything.

Make it big enough (10 ^ 80 GeV) and in theory you could create a laser pulse that was a black hole travelling at lightspeed, severely warping spacetime as it moves!

http://www.advancedphysics.org/viewthread.php?tid=696

Wouldn't the higher energy content somewhat distort the speed since energy is essentially mass as held by E=mc^2 creating an effect I can't quite picture right now? The speed would remain constant I suppose, but to an observer wouldn't it be either faster or slower?

Space tells matter how to move, matter tells space how to warp.

The high energy concentration would be warping spacetime as it goes, enormously, so you'd need a clear frame of reference to describe what you experience if this event went by you.

Re: Lasers and Color light

I don't know what you mean by "cooler", as applied to light. Light speed in a vacuum is the same for all colors -- in air and other materials, there is a slight dispersion, and in most of those materials red light travels a little bit faster than blue light. There is no such thing as "black" light. What is commonly called by that name is really ultraviolet. Its frequency is just outside the reach of our eye so we can barely see it, and its effect is to cause flourescence in some materials. Because white clothes contain flourescent substances to make them look "whiter", the effect is especially strong there.

Hope that helped.

How are objects affected by:
Orange, yellow, green, violet, and indigo-colored lasers?
What about white lasers?
Do rainbow-coloered spectrums exist, and how would an object hit with these types of lasers be affected?

Lasers are by definition monochromatic; since white light is a combination of many different wavelengths, a white laser does not exist. A "rainbow-colored" spectrum is simply white light separated into its different components (typically by diffraction through a prism), so a rainbow-colored laser is also non-existent. You could attempt to produce the effect of a "white" laser by combining many different colored lasers, but there would be some issues with cost, focusing, etc.

Referring to your earlier question re: red lasers/melting, typically the lasers in question produce light in or near the infrared region of the spectrum. Infrared radiation (IR) is essentially heat; by focusing high intensity IR on a very small area, an IR laser can generate extremely high temperatures on that area. This can result in melting, "burning holes", etc.

My question is still not answered-someone said that blue hight has a higher energy content that red light. What kind of energy is that? and what about green lasers and lasers of other colors in the visible spectrum?

Per photon, yes. (Light comes in tiny packages called photons, and each photon has a fixed amount of energy. It is h*nu, where h is a constant that comes out of quantum mechanics, and nu is the frequency of the light, which is inversely proportional to the wavelength.)


Electromagnetic energy. If you are seriously interested in this, the physics textbook most readable for the layman is the Richard Feynman Lectures in physics, volumes 2 and 3. I'm sorry, but there really is no easy way to answer your questions without presupposing some background in physics.

Do yellow, orange, green and violet lasers exist?

Lasers are available throughout the visible spectrum and then some.

Diode lasers are somewhat limited, but they can be tuned.

Rap

How much energy do yellow, orange, green and violet lasers emit? Does anyone have any information about these kinds of lasers?

Raprap, what is a diode laser, and how do they work?

That little red dot on your disc player is a diode lazer. Diode lazers are probably the most common of all lazers.

Rap