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Science-year 7 > Sound And Light > Flashcards

Sound And Light Flashcards

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1
Q

Refraction

A

The bending of light waves when they down whilst going through a different medium

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2
Q

Plane mirror

A

A plain mirror reflects light perfectly(specular reflection)

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3
Q

Cornea

A

The cornea protects the eye

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4
Q

Lens

A

The lens refracts light so you can see

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5
Q

Retina

A

When the light hits here it sends the image to the brain

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6
Q

Speed of light

A

300,000,000 metres a second

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7
Q

Speed of sound

A

340 metres a second in air, 1500 m/s in a liquid and 5000 m/s in a solid.

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8
Q

Pitch

A

How high it is in Hz

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9
Q

Amplitude

A

The volume of a sound

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10
Q

Frequency

A

How high pitch it is

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11
Q

Medium

A

A different material

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12
Q

Spectrum

A

The colures in a rainbow

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13
Q

Wave

A

The transfer of energy

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14
Q

Ultrasound

A

Sound humans can’t hear

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15
Q

Echo

A

Reflection of sound

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16
Q

Audible range

A

The range of what humans can hear

17
Q

Vaccum

A

A place where there are no particles (eg. Space)

18
Q

Convex lens

A

A convex lens converges light by refracting it

19
Q

Concave lens

A

A concave lens diverges light by refracting it

20
Q

Oscillation

A

This is when something moves back and forth continualy

21
Q

Reverberation

A

This courses an echo

22
Q

Trough

A

The top of a wave

23
Q

Reflected ray

A

This is when light bounces of a plane mirror

24
Q

Angle of refraction

A

The angle that is made when something is refracted

25
Q

Incident ray

A

The ray that gets reflected

26
Q

Specular reflection

A

Specular reflection is the mirror like reflection

27
Q

Transversal wave

A

When the vibrations are at a right angle

28
Q

Longitudinal wave

A

This is when the wave is parallel

29
Q

Law of reflection

A

The incident ray and reflected rays angles compared to the normal are the same

30
Q

Diffuse scattering

A

When the light hits a rough surface and scatters

31
Q

Dispersion

A

the separation of white light into colours

32
Q

Wave length

A

the distance over which the wave’s shape repeats

Science-year 7 (9 decks)

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