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physics - energy > Light > Flashcards

Light Flashcards

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1
Q

what does light consist of?

A

tiny packages of energy called photons

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2
Q

what does light travel in?

A

straight lines

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3
Q

what is a vaccum?

A

a vaccum is a volume of empty matter

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4
Q

What is lights speed?

A

300,000km/s

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5
Q

what does luminous mean?

A

it means a object that produces its own light

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6
Q

what does nonluminous mean

A

a object that does not produce its own light

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7
Q

what are examples of luminous objects

A

the sun, phones, light bulb

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8
Q

what are examples of non luminous objects?

A

paper, moon

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9
Q

what do luminous objects do

A

emit

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10
Q

what do non luminous objects do

A

reflect

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11
Q

what is transparent

A

allows all light through

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12
Q

what is translucent

A

allows some light through

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13
Q

what is opaque

A

allows no light through

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14
Q

what levels are the ocean made of

A

the sunlight, twilight and midnight zone

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15
Q

how does light behave

A

like a wave

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16
Q

how do we see something

A

light rays go on the object and reflect into our eyes

17
Q

is it possible to track the speed of light

A

yes scientists have discovered the speed of light

18
Q

why is the sun a star?

A

because it produces its own light which makes it luminous

19
Q

why is the moon non-luminous?

A

because it doesn’t produce its own light, it reflects the light emitted from the sun

20
Q

What does transmitting mean/ transmission of light?

A

when light passes through an object

21
Q

why is it dark at the bottom of the ocean

A

it’s dark at the bottom of the ocean because light can’t travel that far down and the water surface reflects some of the light while the remaining photons that do not penetrate the air, water surface begin to scatter, and are eventually absorbed by opaque particles suspended n the water

22
Q

what colors does the sun consist of

A

the sun consists of red, orange, yellow, green, blue, indigo, and violet. the primary colors are red, blue, and green. this law of reflection states that the angle of the incident equals the angle of reflection

23
Q

what do opaque objects cause

A

a shadow

24
Q

what do translucent objects cause

A

a pale shadow

25
Q

what do transparent objects prevent

A

a solid shadow from forming

26
Q

you can see light when its

A

reflected

27
Q

what does light follow

A

the law of refraction

physics - energy (13 decks)

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