Physics - Waves

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22 Terms

1
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What is the wave speed equation?
wave speed = frequency x wavelength
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What direction do transverse waves vibrate?
Sideways/perpendicular.
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What direction do longitudinal waves vibrate?
Parallel.
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How do you work out wave speed using distance and time?
wave speed = distance/time
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What can happen when a wave meets a boundary?
Absorbed
Transmitted
Reflected
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What is refraction?
Waves changing direction at a boundary.
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What is the normal?
Imaginary line that is perpendicular to the point where the incoming hits the boundary.
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What is the electromagnetic spectrum?
Radio waves.
Micro waves.
Infrared.
Visible light.
Ultraviolet.
X-ray waves.
Gamma rays.
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True or False.
Gamma rays can cause and cure cancer.
True.
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What are 2 uses of x-rays?
Detect broken bones
Detect metal objects in the body
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What is a danger of x-rays?
Cancer.
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What are 2 uses of ultraviolet?
Detect forged bank notes
Destroying bacteria
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What is a danger of ultraviolet rays?
Sunburn
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What are 2 uses of visible light?
Seeing
Photography
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What is a danger of visible light?
Damage to retina cells.
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What are 2 uses of infrared?
Remote control
CookingW
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What are dangers of infrared?
Burns
Low blood pressure
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What are 2 uses of micro waves?
Cooking
Satellite signalsw
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What is a danger of micro waves?
Burns
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What is a use of radiowaves?
Communication
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Are there any dangers of radiowaves?
No
22
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What are electromagnetic waves made up of?
Oscillating charges.