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Physics Flashcards

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1
Q

Definition of vacuum

A

Is where there is no air

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2
Q

What do dark colours do ?

A

Absorb light and heat

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3
Q

What do light colours do ?

A

Reflect light and heat

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4
Q

What are waves

A

Something that transfers energy

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5
Q

What are transverse waves

A

Visible waves eg radiation

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6
Q

What is lateral inversion

A

A plane mirror reflects light regularly so that it produces a clear image which is the same size

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7
Q

What happens when light passes an object of one density into another

A

Its refracted as the light slows down or speeds up

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8
Q

How is density defined

A

By the amount of particles in it

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9
Q

If the wave travels from a less dense object to a dense object

What does it do ?

A

Slows down

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10
Q

If the wave travels from a more dense object to a less object

What does it do ?

A

It speeds up

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11
Q

Definition of refraction

A

Is when light bends

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12
Q

Definition of reflection

A

When light bounces back

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13
Q

What does a wavelength have

A

1 peak

1 trough

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14
Q

Definition of Diffraction

A

As white light travels through a prism the light bends in different directions creating rainbows because white light is made up of 7 colours

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15
Q

What happens when two waves together

A

If they have the same amplitude they construct a new wave

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16
Q

Definition of superposition

A

When two waves meet either creating a new wave or cancelling out eachother

17
Q

Definition of destructive

A

when a peak and trough collide they go flat as they cancel eachother if they change

18
Q

What is dispersion

A

When a ray of light goes through a prism, the prism splits a ray of white light into the colours dont change

19
Q

What does it mean when light isnt reflected

A

It has been absorbed

20
Q

Why cant we hear in space ?

A

There are not enough particles and atoms for sound to vibrate and bounce

21
Q

High frequence =

A

High pitch

22
Q

Low frequency =

A

Low pitched

23
Q

High amplitude =

A

Louder

24
Q

Low amplitude =

A

Quieter

25
Q

What is volume controlled by ?

A

Amplitude of the wave

26
Q

Definition of radiation

A

Does not need particles to act upon

Science (7 decks)

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