Waves Flashcards

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0
Q

Oscillation

A

Moving to and fro about a certain position along a line.

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1
Q

Transverse wave

A

Wave in which the vibrations are perpendicular to the direction of energy transfer.

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2
Q

Perpendicular

A

At right angles.

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3
Q

Longitudinal wave

A

Wave in which the vibrations are parallel to direction of energy transfer.

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4
Q

Compressions

A

Squeezed together.

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5
Q

Rarefraction

A

Stretched apart.

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6
Q

Electromagnetic wave

A

Electric and magnetic disturbance that transfers energy form one place to another. The spectrum of electromagnetic waves, in order of increasing wavelength, is as follows: gamma rays and x-rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.

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7
Q

Mechanical wave

A

Vibrations that travels through a substance.

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8
Q

Amplitude

A

The height of a wave crest or a wave through of a transverse wave from the same position.

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9
Q

Wavelength

A

The distance from one wave crest ( along the waves).

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10
Q

Frequency

A

The number of waves crest passed a fixed point every second.

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11
Q

Speed

A

Distance moved (divid by) time taken.

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12
Q

Plane mirror

A

A flat mirror.

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13
Q

Normal

A

Straight line though a surface or boundary perpendicular to the surface or boundary.

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14
Q

Angle of incidence

A

Angle between the incident ray and the normal

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15
Q

Angle of reflection

A

Angle between the reflected ray and the normal.

16
Q

Real image

A

An image formed where light rays meet.

17
Q

Virtual image

A

The part of the electromagnetic spectrum that can be detected by the human eye.

18
Q

Boundary

A

Line along which two substances meet.

19
Q

Refraction

A

The change of direction of a light ray when it passes across a boundary between two transparent substances ( including air).

20
Q

Diffraction

A

The spreading of waves when they pass through a gap or around the edges of an obstacle that has a similar size as the wavelength of the waves.

21
Q

Sound

A

A from of mechanical energy.

22
Q

Echo

A

Reflection of sound that can be heard.

23
Q

Pitch

A

The pitch of a sound increases if the frequency of the sound waves increases