Physics - Waves
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- Created by: Cheesepuffsgirl
- Created on: 23-01-22 15:11
What is the unit of frequency?
Hertz (Hz) 1 Hz = 1 wave per second
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What type of waves are electromagnetic waves?
Transverse waves
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What is the wave speed?
The wave speed is the speed at which the wave moves through the medium (ie the speed at which energy is transferred).
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Electromagnetic waves transfer energy from the source of the waves to an absorber. E.g. microwaves transfer energy from the source(the oven) to the absorber(food).
Electromagnetic waves transfer energy from the source of the waves to an absorber. E.g. microwaves transfer energy from the source(the oven) to the absorber(food).
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Describe oscillations of a transverse wave
In transverse waves the oscillations are perpendicular to the direction of energy transfer
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What are the two types of waves?
Transverse Longitudinal
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Order of electromagnetic spectrum:
Radio Microwaves Infrared Visible Light Ultraviolet X-rays Gamma rays (Raw Meat Is Very Unsanitary eXcept Girrafe)
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Order of visible light
Red, Orange, Yellow, Green, Blue, Indigo, Violet
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Describe oscillations in a longitudinal wave
The oscillations are parallel to the direction of energy transfer
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On the violet end of the visible light spectrum the waves have a higher frequency and shorter wavelength.
On the violet end of the visible light spectrum the waves have a higher frequency and shorter wavelength.
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Def frequency
The frequency is the number of waves passing a point each second.
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On the red end of the visible light spectrum, the waves have a lower frequency and longer wavelength.
lower
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Do longitudinal waves require a medium to travel in?
Yes, e.g. air, liquid or solid.
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Visible light is the only part of the spectrum that can be detected by the human eye.
only
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Do transverse waves require a medium to travel in?
No.
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In the electromagnetic spectrum, the [...] increases from radio waves to gamma rays.
frequency
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def. period
The period is the time (in seconds) for one wave to pass a point.
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TIn the electromagnetic spectrum, the [...] decreases from radiowaves to gamma rays.
wavelength
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Def. wavelength
The wavelnegth of a wave is the distance from a point on one wave to the equivalent point on the adjacent wave.
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The electromagentic spectrum is a [...] spectrum. The cut-off point between one type of wave and another is not always clear.
continuous
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What is the wave speed equation?
v = f * λ wavespeed(m/s) = frequency(Hz) * wavelength(m)
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Do electromagnetic waves need a medium to travel in?
No.
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Equation for period
period (s) = 1/ frequency(Hz) T = 1/f (This should be given in the exam, but they don't give units so memerise anyway.)
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On a wave does matter travel?
No, only energy travels, matter just oscillates. (Up and down in a transverse wave or side to side in a longitudinal wave).
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Can electromagnetic waves travel through a vacuum?
Yes, such as space.
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Def. amplitude
The ampitude of a wave is the maximum displacement of a point on a wave away from its undisturbed position.
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Def frequency
The frequency is the number of waves passing a point each second.
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On the red end of the visible light spectrum, the waves have a [...] frequency and longer wavelength.
lower
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In the electromagnetic spectrum, the [...] increases from radio waves to gamma rays.
frequency
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What is the symbol for wave length?
the Greek letter: lambda λ
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Electromagnetic waves transfer energy from the source of the waves to an [...]. E.g. microwaves transfer energy from the source(the oven) to the [...](food).
absorber
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On the violet end of the visible light spectrum the waves have a higher frequency and [...] wavelength.
shorter
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On the red end of the visible light spectrum, the waves have a lower frequency and [...] wavelength.
longer
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Visible light is the only part of the spectrum that can be detected by the [...].
human eye
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In the electromagnetic spectrum, the frequency [...] from radio waves to gamma rays.
increases
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In the electromagnetic spectrum, the wavelength [...] from radiowaves to gamma rays.
decreases
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All electromagnetic waves travel at [...] speed through a vacuum.
the same
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Do electromagnetic waves travel at different speeds through a vacuum?
No, they travel at the same speed!
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What speeds do electromagnetic waves travel at through a vacuum?
They all travel at 300000000 m/s (3 * 10^8 m/s)
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[...] materials absorb, transmit, or reflect [...] electromagnetic waves. What happens to the wave depends on the wavelength.
Different
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On the violet end of the visible light spectrum the waves have a higher [...] and shorter wavelength.
frequency
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Other cards in this set
Card 2
Front
What type of waves are electromagnetic waves?
Back
Transverse waves
Card 3
Front
What is the wave speed?
Back
Card 4
Front
Electromagnetic waves transfer energy from the source of the waves to an absorber. E.g. microwaves transfer energy from the source(the oven) to the absorber(food).
Back
Card 5
Front
Describe oscillations of a transverse wave
Back
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