EBME Forums Forums Free discussion Free discussion Definition of Light

Could do with a couple of bottles of of a light beer at the moment as opposed to heavy....

Alcoholic Beverages:

Beer X% alcohol
Wine Y% alcohol
Spirits Z% alcohol

Electromangetic Wavelengths:

Light Xnm
X-rays Ynm
Gamma-rays Znm


(If light is "all electromagnetic wavelengths" then "beer" is "all alcoholic beverages" ). Sorry I was bored.

Hmmmm,symantics,


Brontosaurus excelsus was named in 1879 by Marsh, based on a rather good specimen. Unfortunately, two years earlier he'd named some much scrappier remains with the rather less resonant name Apatosaurus ajax.
In 1903, Elmer Riggs' re-examination of Marsh's specimens led him to conclude that they represented the same genus (although see below), meaning that the names were synonyms. In such cases, the ICZN (International Commission on Zoological Nomenclature, see http://www.iczn.org/ mandates that the oldest name has priority - which means that the rather dull Apatosaurus (``deceptive lizard'') wins out over the much more resonant ``Brontosaurus'' (``thunder lizard'').

So Haz, gonny get back to work and I'll have a real big beer 2.

If the speed of light is 299,792,458 metres per second, the fastest thing ever.

How come darkness is always there first?

A.M

Rog,

Is that symantics or did you mean semantics. You should know by now not to send out any correspondence without me checking it over first.

Have a drink on me.
H

Yeah, but what's the definition of light?

Not Heavy

That agent, force, or action in nature by the operation of which upon the organs of sight, objects are rendered visible or luminous.
I think?

The definition of Light from Wikipaedia:

Light is electromagnetic radiation with a wavelength that is visible to the eye, or in a more general sense, any electromagnetic radiation in the range from infrared to ultraviolet. The three basic dimensions of light (and of all electromagnetic radiation) are:

intensity (or brilliance or amplitude, perceived by humans as the brightness of the light),
frequency (or wavelength, perceived by humans as the color of the light), and
polarization (or angle of vibration and not perceivable by humans under ordinary circumstances)
Due to wave-particle duality, light simultaneously exhibits properties of both waves and particles. The precise nature of light is one of the key questions of modern physics.


After that last sentence do you think we are going to settle on the answer to the ultimate question of LIGHT, the universe and everything?

Robert

C=speed of light
Does this mean anything which can travel at c is light? Or am I inviting syllogisms?
Be gentle, this post has just popped my forum cherry.