Cosa (chi) è light - definizione

ELECTROMAGNETIC RADIATION IN OR NEAR VISIBLE SPECTRUM

Visible light; Light waves; Exciting light; Visible Light; Light generation; Light source; Lightsource; Undulatory theory; Light Wave; Vislble light; Light reflection; Optic light; Electromagnetic theory of light; Undulatory theory of light; Light sources; Light in space; Light wavelength; Properties of light; Propagation of light; Self-torque

$Due to refraction, the straw dipped in water appears bent and the ruler scale compressed when viewed from a shallow angle.$
$Thomas Young]]'s sketch of a [[double-slit experiment]] showing [[diffraction]]. Young's experiments supported the theory that light consists of waves.$

Light

·noun Life; existence.

II. Light ·adv Lightly; cheaply.

III. Light ·vi To feel light; to be made happy.

IV. Light ·noun The power of perception by vision.

V. Light ·noun The brightness of the eye or eyes.

VI. Light ·noun Prosperity; happiness; joy; felicity.

VII. Light ·superl Slight; not important; as, a light error.

VIII. Light ·superl Easily bestowed; inconsiderately rendered.

IX. Light ·superl Well leavened; not heavy; as, light bread.

X. Light ·superl Wanton; unchaste; as, a woman of light character.

XI. Light ·superl Not strong or violent; moderate; as, a light wind.

XII. Light ·superl Loose; sandy; easily pulverized; as, a light soil.

XIII. Light ·vi To become ignited; to take fire; as, the match will not light.

XIV. Light ·vt To Lighten; to ease of a burden; to take off.

XV. Light ·noun Open view; a visible state or condition; public observation; publicity.

XVI. Light ·noun To attend or conduct with a light; to show the way to by means of a light.

XVII. Light ·vi To descend from flight, and rest, perch, or settle, as a bird or insect.

XVIII. Light ·superl Not quite sound or normal; somewhat impaired or deranged; dizzy; giddy.

XIX. Light ·superl Having light; not dark or obscure; bright; clear; as, the apartment is light.

XX. Light ·superl Not of the legal, standard, or usual weight; clipped; diminished; as, light coin.

XXI. Light ·superl Not encumbered; unembarrassed; clear of impediments; hence, active; nimble; swift.

XXII. Light ·vi To come down suddenly and forcibly; to Fall;

- with on or upon.

XXIII. Light ·noun The time during which the light of the sun is visible; day; especially, the dawn of day.

XXIV. Light ·superl Not heavily armed; armed with light weapons; as, light troops; a troop of light horse.

XXV. Light ·vi To come by chance; to Happen;

- with on or upon; formerly with into.

XXVI. Light ·noun That which furnishes, or is a source of, light, as the sun, a star, a candle, a lighthouse, ·etc.

XXVII. Light ·superl Easy to be endured or performed; not severe; not difficult; as, a light affliction or task.

XXVIII. Light ·noun One who is conspicuous or noteworthy; a model or example; as, the lights of the age or of antiquity.

XXIX. Light ·superl Not heavily burdened; not deeply laden; not sufficiently ballasted; as, the ship returned light.

XXX. Light ·superl Not copious or heavy; not dense; not inconsiderable; as, a light rain; a light snow; light vapors.

XXXI. Light ·superl Easy to be digested; not oppressive to the stomach; as, light food; also, containing little nutriment.

XXXII. Light ·superl Not burdensome; easy to be lifted, borne, or carried by physical strength; as, a light burden, or load.

XXXIII. Light ·superl Having little, or comparatively little, weight; not tending to the center of gravity with force; not heavy.

XXXIV. Light ·noun To give light to; to Illuminate; to fill with light; to spread over with light;

- often with up.

XXXV. Light ·superl Indulging in, or inclined to, levity; wanting dignity or solemnity; trifling; gay; frivolous; airy; unsubstantial.

XXXVI. Light ·noun That which illumines or makes clear to the mind; mental or spiritual illumination; enlightenment; knowledge; information.

XXXVII. Light ·vi To be illuminated; to receive light; to Brighten;

- with up; as, the room lights up very well.

XXXVIII. Light ·noun A firework made by filling a case with a substance which burns brilliantly with a white or colored flame; as, a Bengal light.

XXXIX. Light ·noun That agent, force, or action in nature by the operation of which upon the organs of sight, objects are rendered visible or luminous.

XL. Light ·superl Not pressing heavily or hard upon; hence, having an easy, graceful manner; delicate; as, a light touch; a light style of execution.

XLI. Light ·superl White or whitish; not intense or very marked; not of a deep shade; moderately colored; as, a light color; a light brown; a light complexion.

XLII. Light ·vi To Dismount; to descend, as from a horse or carriage; to Alight;

- with from, off, on, upon, at, in.

XLIII. Light ·noun Appearance due to the particular facts and circumstances presented to view; point of view; as, to state things fairly and put them in the right light.

XLIV. Light ·superl Easy to admit influence; inconsiderate; easily influenced by trifling considerations; unsteady; unsettled; volatile; as, a light, vain person; a light mind.

XLV. Light ·noun The medium through which light is admitted, as a window, or window pane; a skylight; in architecture, one of the compartments of a window made by a mullion or mullions.

XLVI. Light ·noun To set fire to; to cause to burn; to set burning; to Ignite; to Kindle; as, to light a candle or lamp; to light the gas;

- sometimes with up.

XLVII. Light ·noun The manner in which the light strikes upon a picture; that part of a picture which represents those objects upon which the light is supposed to fall; the more illuminated part of a landscape or other scene;

- opposed to shade. ·cf. Chiaroscuro.

light

I. n.

Medium of vision.

Diffusion of luminous rays.

Daybreak, sunrise, dawn, daylight, break of day, peep of day.

Candle, lamp, taper.

Instruction, knowledge, information, comprehension, insight.

Illustration, explanation, elucidation.

Window, pane (of glass), etc.

Public notice.

Aspect, point of view.

II. a.

Buoyant, of little weight.

Easy (to be borne), not burdensome.

Easy (to be done), not difficult.

Porous, spongy, well leavened (said of bread).

Loose, sandy (said of soil).

Unencumbered, unburdened, free from impediments.

Slight, trifling, small, inconsiderable, moderate.

Gossamery, flimsy, unsubstantial.

Frivolous, fickle, unsteady, volatile, unsettled.

10.

Gay, airy, buoyant, light-hearted.

11.

Bright, clear, not dark.

12.

Whitish, of a whitish shade.

III. v. a.

Kindle, ignite, set fire to, set on fire, apply the match to.

Illumine, give light to, guide by light.

Illuminate, lighten, illume, irradiate.

light

I. BRIGHTNESS OR ILLUMINATION

(lights, lighting, lit, lighted, lighter, lightest)

Frequency: The word is one of the 1500 most common words in English.

Note: The form 'lit' is the usual past tense and past participle, but the form 'lighted' is also used.

Please look at category 17 to see if the expression you are looking for is shown under another headword.

Light is the brightness that lets you see things. Light comes from sources such as the sun, moon, lamps, and fire.

Cracks of light filtered through the shutters...

It was difficult to see in the dim light.

...ultraviolet light.

? darkness

N-UNCOUNT: also the N

A light is something such as an electric lamp which produces light.

The janitor comes round to turn the lights out...

...street lights.

N-COUNT

You can use lights to refer to a set of traffic lights.

...the heavy city traffic with its endless delays at lights and crossings.

N-PLURAL

If a place or object is lit by something, it has light shining on it.

It was dark and a giant moon lit the road so brightly you could see the landscape clearly...

The room was lit by only the one light...

The low sun lit the fortress walls with yellow light.

VERB: V n, V n, V n with n

If it is light, the sun is providing light at the beginning or end of the day.

It was still light when we arrived at Lalong Creek...

...light summer evenings.

? dark

ADJ

If a room or building is light, it has a lot of natural light in it, for example because it has large windows.

It is a light room with tall windows...

= bright

? dark

ADJ

• lightness

The dark green spare bedroom is in total contrast to the lightness of the large main bedroom.

N-UNCOUNT: usu with supp

If you light something such as a cigarette or fire, or if it lights, it starts burning.

Stephen hunched down to light a cigarette...

If the charcoal does fail to light, use a special liquid spray and light it with a long taper.

...a lighted candle.

VERB: V n, V, V-ed

If someone asks you for a light, they want a match or cigarette lighter so they can start smoking. (INFORMAL)

Have you got a light anybody?

N-SING: a N

If something is presented in a particular light, it is presented so that you think about it in a particular way or so that it appears to be of a particular nature.

He has worked hard in recent months to portray New York in a better light.

N-COUNT: with supp

10.

see also lighter
, lighting
, bright lights
, night light
, pilot light
, red light

11.

If something comes to light or is brought to light, it becomes obvious or is made known to a lot of people.

The truth is unlikely to be brought to light by the promised enquiry.

PHRASE: V inflects

12.

If light dawns on you, you begin to understand something after a period of not being able to understand it.

At last the light dawned. He was going to marry Phylis!

PHRASE: V inflects

13.

If someone in authority gives you a green light, they give you permission to do something.

The food industry was given a green light to extend the use of these chemicals...

PHRASE: PHR after v, v-link PHR

14.

If something is possible in the light of particular information, it is only possible because you have this information.

In the light of this information it is now possible to identify a number of key issues.

PREP-PHRASE

15.

If someone sees the light, they finally realize something or chang1 their attitude or way of behaving to a better one.

I saw the light and ditched him.

PHRASE: V inflects

16.

If you set light to something, you make it start burning. (mainly BRIT; in AM, use set fire to
)

They had poured fuel through the door of the flat and had then set light to it.

PHRASE: V inflects: PHR n

17.

To shed light on, throw light on, or cast light on something means to make it easier to understand, because more information is known about it.

A new approach offers an answer, and may shed light on an even bigger question.

= clarify

PHRASE: V inflects, PHR n

18.

When you talk about the light at the end of the tunnel, you are referring to the end of the difficult or unpleasant situation that you are in at the moment.

All I can do is tell her to hold on, that there's light at the end of the tunnel.

PHRASE

19.

all sweetness and light: see sweetness

II. NOT GREAT IN WEIGHT, AMOUNT, OR INTENSITY

(lighter, lightest)

Frequency: The word is one of the 3000 most common words in English.

Something that is light does not weigh very much, or weighs less than you would expect it to.

Modern tennis rackets are now apparently 20 per cent lighter.

...weight training with light weights...

Try to wear light, loose clothes.

? heavy

ADJ

• lightness

The toughness, lightness, strength, and elasticity of whalebone gave it a wide variety of uses.

N-UNCOUNT: usu with supp

Something that is light is not very great in amount, degree, or intensity.

It's a Sunday like any other with the usual light traffic in the city...

...a light breeze.

ADJ

• lightly

Put the onions in the pan and cook until lightly browned.

ADV: usu ADV -ed, also ADV after v

Light equipment and machines are small and easily moved, especially because they are not heavy.

...a convoy of light armoured vehicles...

They used light machine guns and AK forty-sevens.

ADJ: ADJ n

Something that is light is very pale in colour.

The walls are light in colour and covered in paper...

He is light haired with gray eyes.

? dark

ADJ

•

Light is also a combining form.

We know he has a light green van.

...a light blue box.

COMB in COLOUR

A light sleep is one that is easily disturbed and in which you are often aware of the things around you. If you are a light sleeper, you are easily woken when you are asleep.

She had drifted into a light sleep...

She was usually a light sleeper.

? deep

ADJ: ADJ n

• lightly

He was dozing lightly in his chair.

ADV: ADV after v

A light sound, for example someone's voice, is pleasantly quiet.

The voice was sweet and light.

ADJ

A light meal consists of a small amount of food, or of food that is easy to digest.

...a light, healthy lunch.

? heavy

ADJ

• lightly

She found it impossible to eat lightly.

ADV: ADV after v

Light work does not involve much physical effort.

He was on the training field for some light work yesterday.

ADJ: usu ADJ n

If you describe the result of an action or a punishment as light, you mean that it is less serious or severe than you expected.

She confessed her astonishment at her light sentence when her father visited her at the jail.

= lenient

ADJ

• lightly

One of the accused got off lightly in exchange for pleading guilty to withholding information from Congress.

ADV: ADV after v

10.

Movements and actions that are light are graceful or gentle and are done with very little force or effort.

Use a light touch when applying cream or make-up...

There was a light knock at the door.

= gentle

ADJ

• lightly

He kissed her lightly on the mouth...

Knead the dough very lightly.

ADV: ADV with v

• lightness

She danced with a grace and lightness that were breathtaking.

N-UNCOUNT

11.

see also lighter

III. UNIMPORTANT OR NOT SERIOUS

(lighter, lightest)

Frequency: The word is one of the 3000 most common words in English.

Please look at category 5 to see if the expression you are looking for is shown under another headword.

If you describe things such as books, music, and films as light, you mean that they entertain you without making you think very deeply.

...light classical music.

...a light entertainment programme.

ADJ: usu ADJ n

If you say something in a light way, you sound as if you think that something is not important or serious.

Talk to him in a friendly, light way about the relationship...

Let's finish on a lighter note.

? serious

ADJ: usu ADJ n

• lightly

'Once a detective, always a detective,' he said lightly.

ADV: ADV after v

• lightness

'I'm not an authority on them,' Jessica said with forced lightness.

N-UNCOUNT

If you say that something is not a light matter, you mean that it should be treated or considered as being important and serious.

It can be no light matter for the Home Office that so many young prisoners should have wanted to kill or injure themselves.

ADJ: usu with brd-neg

• lightly

His allegations cannot be lightly dismissed.

ADV: ADV with v

If you make light of something, you treat it as though it is not serious or important, when in fact it is.

Roberts attempted to make light of his discomfort.

= play down

PHRASE: V inflects

to make light work of: see work

see also lighter

Wikipedia

Light

Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths).

In physics, the term "light" may refer more broadly to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum and polarization. Its speed in vacuum, 299792458 m/s, is one of the fundamental constants of nature. Like all types of electromagnetic radiation, visible light propagates by massless elementary particles called photons that represents the quanta of electromagnetic field, and can be analyzed as both waves and particles. The study of light, known as optics, is an important research area in modern physics.

The main source of natural light on Earth is the Sun. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. With the development of electric lights and power systems, electric lighting has effectively replaced firelight.

https://en.wikipedia.org/wiki/Light

Esempi di pronuncia per light