Waves (wave properties - waves for detection and exploration) Flashcards

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1
Q

What is the equation for period

A

1/frequency

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2
Q

what is the equation for wave speed?

A

frequency x wavelength

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3
Q

What are transverse waves?

A

waves that oscillate perpendicular to the direction of energy transfer

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4
Q

what are the longitudinal waves?

A

waves that oscillate parallel to the direction of energy transfer

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5
Q

What is the definition of frequency?

A

the number of waves passing a fixed point per second

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6
Q

what is amplitude?

A

the maximum displacement that any particle achieve from its undisturbed position

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7
Q

what is the wavelength?

A

the distance from one point on a wave to the equivalent point on the next wave

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8
Q

what is a period?

A

the time taken for one complete oscillation in seconds

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9
Q

What do waves transfer?

A

energy

NOT MATTER

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10
Q

what is the relationship between the wavelength and speed?

A

they are directly proportional

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11
Q

What happens when a wave is transmitted from one medium to another

A

their speed and wavelength changes

frequency stays the same

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12
Q

Why does the frequency stay the same when a wave is transmitted from one medium to another?

A

because the same number of waves is still being produced by the source per second

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13
Q

What does the amplitude indicate?

A

the amount of energy a wave is carrying

the more energy the higher the amplitude

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14
Q

When waves reach a boundary between one medium and another, they can be …….

A

reflected, refracted, absorbed or transmitted

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15
Q

What does the direction of refraction depend on?

A
  • the angle at which the wave hits the boundary

- the materials involved

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16
Q

what happens when light travels from a material with a low refractive index to one with a higher refractive index?

A

it bends towards the normal

- slows down

17
Q

high refractive index to low refractive index =

A

refracts away from the normal

- speeds up

18
Q

Refraction is due to ……

A

difference in the wave speed in the different media

19
Q

What happens when light enters, at an angle, a medium in which it travels slower

A
  • the first part of the light wave to enter the medium slows down
  • the rest of the wave continues at the higher speed
  • causes the wave to change direction towards the normal