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EM_Waves
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1994-08-31
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2KB
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100 lines
@What do waves carry from one place to another?
Energy
Heat
Light
@Which one of the following is a correct statement for e.m waves?
They all travel through space
None of them can travel through space
Some can travel a little way through space
@Which one of the following statements is NOT correct?
E.m waves travel very slowly
E.m waves all travel at the same speed in space
E.m waves all have different wavelengths
@Approximately how fast do e.m waves travel?
300,000,000 m/s
330 m/s
3,000 m/s
@Which one of the following is NOT an e.m wave?
Sound
Light
X-Rays
@What is the correct formula for calculating the speed of an e.m wave?
velocity = frequency x wavelength
velocity = speed x frequency
velocity = wavelength/speed
@Which one of the following statements about the wavelength of an e.m wave is incorrect
It's measured from the top of one wave to the bottom of the next
It's measured from the top of one wave to the top of the next
It's from the middle of one wave to the middle of the next
@What is frequency?
How many waves you have in one second
The number of seconds it takes a wave to travel one metre
The shape of the wave
@Which one of the following colours has the longest wavelength?
Red
Blue
Green
@Which of the following colours has the shortest wavelength?
Blue
Red
Magenta
@Three examples of electromagnetic waves are:
Light, gamma rays & radio waves
Light, sound and X-rays
Radio, alpha radiation & infra-red
@When two sets of waves meet each other what happens?
They interfere with each other
Neither of them is affected in any way
Both sets of waves are always totally destroyed
@When waves pass through gaps they:
Diffract
Deflect
Disturb
@Which types of waves have wavelengths that can be hunderds of metres long?
Radio
X-Rays
Microwaves
@What would be a typical wavelength for microwaves?
About 10cm
One millionth of a metre
Three hundred metres
@Which one of the following has the shortest wavelength?
Gamma rays
Light
Microwaves
@Water in a solar panel is heated by bright sunshine. Which part of the EM spectrum is responsible for this heating?
Infra-Red
Ultra-Violet
Visible Light
@What type of wave is responsible for sun tans?
Ultra-violet
Infra-red
Gamma rays
@Photographic film could not be used to detect which one of the following:
Microwaves
Ultra-violet
X-rays
@Which of the following statements about UV light and visible is NOT correct?
They have the same wavelength
They can be reflected by mirrors
They vibrate transversely