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year 8 Science > Light > Flashcards

Light Flashcards

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Biology 101 flashcards
0
Q

What does light carry?

A

Energy.

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1
Q

What does light travel in?

A

Wavelengths.

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2
Q

Light travels at the speed of…

A

300,000,km per second.

300,000 km per second.

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3
Q

What describes light?

A

The electromagnetic spectrum.

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4
Q

What else is in the electromagnetic spectrum?

A 
Radio waves
Microwaves
Infa red
Ultra violet
X rays 
Cosmic rays
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5
Q

The smaller the wavelength, the…

A

More energy it holds.

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6
Q

Opaque…

A

…doesn’t let light through.

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7
Q

Translucent…

A

Lets some light through.

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8
Q

Transparent…

A

Lets light pass through.

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9
Q

Light from the object…

A

…ENTERS YOUR EYE.

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10
Q

How do we see objects?

A

Because they are light objects
Or
Because other lights reflect onto them.

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11
Q

What gives out light?

A

A luminous object or light source.

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12
Q

What doesn’t give out light?

A

A non-luminous object eg a book.

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13
Q

What is lateral inversion?

A

Lateral inversion is where a mirror image of yourself is turned the other way round for example: words become backwards.

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14
Q

What is the angle of incidence?

A

Angle of the beam of light.

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15
Q

What is the angle of reflection?

A

The angle of reflected light.

16
Q

Angle of incidence = …

A

…angle of reflection.

17
Q

The distance from behind the mirror…

A

… To the image is the same distance from the object to the mirror.

18
Q

How long does light take to get from the sun to the earth?

A

510 seconds.

19
Q

Laser beam particles bounce off…

A

The dust in the air.

20
Q

What is refraction?

A

refraction is when light changes direction when it goes through one substance to another.

21
Q

What are all the colours of the rainbow?

A 
Red 
orange 
yellow 
green 
blue 
Indigo 
Violet
22
Q

What is white light split into?

A

Red and Indigo,then all of the other colours of the rainbow.

23
Q

Which colour is refracted least?

A

Red.

24
Q

Which colour is refracted most?

A

Indigo.

25
Q

What are the three light primary colours?

A

Red and blue and green.

26
Q

Blue and red equals…

A

Magenta

27
Q

Blue plus green equal…

A

Cyan.

28
Q

Green plus red…

A

…yellow.

29
Q

All colours…

A

White.

year 8 Science (10 decks)

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