Definition of light (Entry 2 of 6) 1 : having light : bright a light airy room. Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. The study of light, known as optics, is an important research area in modern physics.When light hits an opaque object it forms a shadow. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Light is used to describe foods or drinks that contain few calories or low amounts of sugar, fat, or alcohol. he read poetry to her by the light of the moon. Her presence lighted up the room.to ignite a cigar, cigarette, or pipe for purposes of smoking (usually followed by to become bright, as with light or color (often followed by to brighten with animation or joy, as the face or eyes (often followed by The excavations brought to light the remnants of an ancient civilization.Some previously undiscovered letters have lately come to light.She worshiped him, but then she'd only seen him in a good light.It was necessary to review the decision in the light of recent developments.We haven't solved the problem yet, but we're beginning to see light at the end of the tunnel.to begin to accept or understand a point of view one formerly opposed: Her father was opposed to her attending an out-of-town college, but he finally saw the light.His deathbed confession threw light on a mystery of long standing.of little weight in proportion to bulk; of low specific gravity: light trading on the stock market; a light rain; light sleep.using or applying little or slight pressure or force: The child petted the puppy with light, gentle strokes.The writing on the page had become light and hard to read.easy to endure, deal with, or perform; not difficult or burdensome: not very profound or serious; amusing or entertaining: low in any substance, as sugar, starch, or tars, that is considered harmful or undesirable: (especially of beer and wine) having fewer calories and usually a lower alcohol content than the standard product.characterized by lack of proper seriousness; frivolous: a heart light of love; His is a life of a man light of purpose.having little or no cargo, encumbrance, or the like; not burdened: adapted by small weight or slight build for small loads or swift movement: using small-scale machinery primarily for the production of consumer goods: noting any sail of light canvas set only in moderate or calm weather, as a royal, skysail, studdingsail, gaff topsail, or spinnaker.

This wavelength means a frequency range of roughly 430–750 terahertz (THz). the illumination from the sun; daylight: We awoke at the first … A body at a given temperature emits a characteristic spectrum of The peak of the black-body spectrum is in the deep infrared, at about 10 Atoms emit and absorb light at characteristic energies.

STEP TWO . Find more ways to say light, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. When EMR interacts with single atoms and molecules, its behavior depends on the amount of energy per quantum it carries. before the 12th century, in the meaning defined at before the 12th century, in the meaning defined at before the 12th century, in the meaning defined at before the 12th century, in the meaning defined at before the 12th century, in the meaning defined at before the 12th century, in the meaning defined at Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!Learn a new word every day. (of wind) having a speed up to 7 miles per hour (3 meters per second).to get down or descend, as from a horse or a vehicle: As she lighted, the journalists began shouting questions at her.to come to rest, as on a spot or thing; fall or settle upon; land: The bird lighted on the branch.

However, for example in Descartes is not the first to use the mechanical analogies but because he clearly asserts that light is only a mechanical property of the luminous body and the transmitting medium, Descartes' theory of light is regarded as the start of modern physical optics.The wave theory predicted that light waves could interfere with each other like sound waves (as noted around 1800 by Later, Fresnel independently worked out his own wave theory of light, and presented it to the The weakness of the wave theory was that light waves, like sound waves, would need a medium for transmission.


It is made up of electromagnetic waves with wavelengths between 4 X 10Electromagnetic energy of a wavelength just outside the range the human eye can detect, such as infrared light and ultraviolet light. phos [ fw'" ]). Enter your details and your receipt number, and your Field Notes will be whooshed over.
Visible light is usually defined as having wavelengths in the range of 400–700 nanometers (nm), or 4.00 × 10 −7 to 7.00 × 10 −7 m, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths).

and from electrical devices, and that allows…. blaze, flare, fluorescence, glare, gleam, glow, Published by Houghton Mifflin Harcourt Publishing Company. Names meaning light can commemorate a sunny day or burst of knowledge, can confer brightness on your baby's future or illuminate a mid-winter birth.


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