A spectrum of waves Flashcards

1
Q

what is the crest of a wave.

A

The highest point on a wave above its rest position

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2
Q

what is the tough of a wave.

A

lowest point on a wave below its rest position.

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3
Q

What does it mean by a wavelength.

A

distance between two successive points on a wave having the same displacement and moving in the same direction

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4
Q

What is frequency

A

The number of complete waves passing a point in one second,

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5
Q

What is the amplitude of a wave,

A

maximum displacement of a particle from its rest position.

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6
Q

Name the electromagnetic spectrum in order.

A

radio-microwave-infrared-visible-UV-x ray- gamma

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7
Q

why does refraction occur

A

the speed of waves decrease as the wave enters a more dense medium and increases as the wave entered a less dense medium, frequency stays the same but wavelength does not.

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8
Q

What is diffraction

A

the spreading out of waves as it passes through a gap, the most diffraction occurs when the gap is a similar size to the wavelength, larger gap shows less diffraction.

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