其他資料列表: 1.The Science of Light - Teacher Professional Developmentwww.learner.org /teacherslab/science/light
The Science of Light provides hands-on activities for teachers and their students who are exploring light , color, reflection, refraction, etc.
Light | Definition of Light by Merriam-Webster www.merriam-webster.com /dictionary/light
The landscape was bathed in light . a photograph taken in low light . the light of the moon. a mixture of light and shadow. The windows let fresh air and light into the room.
How Light Works | HowStuffWorks science.howstuffworks.com /light
Light is at once both obvious and mysterious. We are bathed in yellow warmth every day and stave off the darkness with incandescent and fluorescent bulbs.
NOUN
the natural agent that stimulates sight and makes things visible:
"the light of the sun" · "the lamps in the street shed a faint light into the room"
a source of illumination, especially an electric lamp:
"a light came on in his room" decorative illuminations:
"Christmas lights" a traffic light:
"turn right at the lights" the amount or quality of light in a place:
"the plant requires good light" · "in some lights she could look beautiful"
an expression in someone's eyes indicating a particular emotion or mood:
"a shrewd light entered his eyes" understanding of a problem or mystery; enlightenment:
"she saw light dawn on the woman's face" an area of something that is brighter or paler than its surroundings:
"sunshine will brighten the natural lights in your hair" a device used to produce a flame or spark:
"he asked me for a light" a window or opening to let light in.
"the bedroom has a wide bay with leaded lights" a person eminent in a particular sphere of activity:
"such lights of Liberalism as the historian Goldwin Smith" (in a crossword puzzle) a blank space to be filled by a letter.
VERB
provide with light or lighting; illuminate:
"the room was lit by a number of small lamps" · "lightning suddenly lit up the house"
make (something) start burning; ignite:
"Alan gathered sticks and lit a fire" · synonyms: set alight · set light to · set burning · set on fire ·
begin to burn; be ignited:
"the gas wouldn't light properly" ignite a cigarette, cigar, or pipe and begin to smoke it:
"she lit up a cigarette and puffed on it serenely" · "workers who light up in prohibited areas face dismissal"
ADJECTIVE
having a considerable or sufficient amount of natural light; not dark:
"the bedrooms are light and airy" synonyms: bright · full of light · well lit · well lighted ·
(of a colour) pale:
"her eyes were light blue"
ORIGIN
Old English lēoht, līht (noun and adjective), līhtan (verb), of Germanic origin; related to Dutch licht and German Licht, from an Indo-European root shared by Greek leukos ‘white’ and Latin lux ‘light’.
ADJECTIVE
of little weight; not heavy:
"light alloy wheels" · "you're as light as a feather"
synonyms: easy to lift · not heavy · weighing very little ·
lightweight ·
deficient in weight, especially by a specified amount:
"the sack of potatoes is 5 kilos light" carrying or suitable for small loads:
"light commercial vehicles" carrying only light armaments:
"light infantry" (of a vehicle, ship, or aircraft) travelling unladen or with less than a full load.
(of soil) friable, porous, and workable.
(of an isotope) having not more than the usual mass; (of a compound) containing such an isotope.
not strongly or heavily built or made:
"light, impractical clothes" · relatively low in density, amount, or intensity:
"passenger traffic was light" · (of food or a meal) small in quantity and easy to digest:
"a light supper" (of a foodstuff) low in fat, cholesterol, sugar, or other rich ingredients:
"stick to a light diet" (of drink) not strongly alcoholic or heavy on the stomach:
"a light Hungarian wine" (of pastry or cake) fluffy or well aerated during cooking.
"it was delicious, the pastry light and flaky" gentle or delicate:
"she planted a light kiss on his cheek" · "my breathing was steady and light"
(of entertainment) requiring little mental effort; not profound or serious:
"pop is thought of as light entertainment" · (of sleep or a sleeper) easily disturbed.
"I'm a light sleeper" · "her sleep was light and fitful"
(of a woman) promiscuous.
ORIGIN
Old English lēocht, līht (noun), lēohte (adverb), of Germanic origin; related to Dutch licht and German leicht, from an Indo-European root shared by lung.
VERB
come upon or discover by chance:
"he lit on a possible solution" descend:
"from the horse he lit down"
ORIGIN
Old English līhtan (in sense 2; also ‘lessen the weight of’), from light2; compare with alight1.
RELATED FORMS light(1) light(2) light(3)
light (noun) light (verb) lights (third person present) lit (past tense) lighting (present participle) lighted (past participle) light (adjective) lighter (comparative adjective) lightest (superlative adjective)
light (adjective) lighter (comparative adjective) lightest (superlative adjective)
light (verb) lights (third person present) lit (past tense) lit (past participle) lighted (past tense) lighted (past participle) lighting (present participle)
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Physics4Kids.com: Light & Optics: Introduction www.physics 4kids.com/files/light _intro.html
Types of Light To understand light you have to know that what we call light is what is visible to us. Visible light is the light that humans can see.
What Is Light ? - How Light Works | HowStuffWorks science.howstuffworks.com /light 1.htm
By the 17th century, some prominent European scientists began to think differently about light . One key figure was the Dutch mathematician-astronomer Christiaan Huygens.
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