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50 Cards in this Set
- Front
- Back
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What does the frequency of a wave describe? |
number of waves per second |
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What are the units for frequency? |
hertz |
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What does the wavelength of a wave describe? |
distance from one point on a wave to the same point on next wave |
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What are the standard units for wavelength? |
metres |
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What does refraction mean? |
waves changing direction when they go from one material to another |
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What is a vacuum? |
empty space |
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What materials can light pass through |
vacuum, air, glass, water |
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Are light waves transverse or longitudinal? |
transverse |
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What do all waves transfer? |
energy |
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A nanometre is one millionth of a millimetre. Why arenanometres sometimes used for giving the wavelengths of light waves? |
the wavelength is very short |
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What are the colours of the rainbow? |
red, orange, yellow, green, blue, indigo, violet |
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What piece of apparatus can you use to split up light to forma spectrum? |
prism |
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Which colour in visible light has the longest wavelength? |
red |
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What does EM stand for? |
electromagnetic |
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Which EM waves have frequencies just higher than thefrequency of visible light? |
ultraviolet |
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Which EM waves have frequencies just lower than the frequencyof visible light? |
infrared |
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Are EM waves transverse or longitudinal? |
transverse |
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Which part of our bodies detects visible light? (eyes)-^s |
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Which part of our bodies detects infrared? |
skin |
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H Name two parts of the EM spectrum that can travel through theatmosphere. |
All can to some extent, but the expected answer at this stage is infrared and visible light, as we can detect both of these from the Sun |
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Which electromagnetic waves have the highest frequency? |
gamma rays |
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Which electromagnetic waves have the longest wavelengths? |
radio waves |
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Which electromagnetic waveshave lower frequencies than visible light? |
infrared, microwaves, radio waves |
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Which electromagnetic waves have higher frequencies thanvisible light? |
ultraviolet, X-rays, gamma rays |
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Which colour of visible light has the shortest wavelength? |
violet |
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Which colour of visible light has the highest frequency? |
violet |
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Which colour of visible light has the lowest frequency? |
red |
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Which part (or parts) of the electromagnetic spectrum is usedfor cooking? |
infrared, microwaves |
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Which part (or parts) of the electromagnetic spectrum is usedfor sending TV programmes? |
radio waves, microwaves |
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Which part of the electromagnetic spectrum is used in TVremote controls? |
infrared |
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Which part of the electromagnetic spectrum is detected by oureyes? |
visible |
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Which part of the electromagnetic spectrum is emitted bytoasters and grills? |
infrared |
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Which part of the electromagnetic spectrum is used for mobilephone communications? |
microwaves |
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Which part of the electromagnetic spectrum are light bulbsdesigned to emit? |
visible light |
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Which part of the electromagnetic spectrum is used to cookfood from the inside? (microwaves)>^s |
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Which part of the electromagnetic spectrum is used to treatcancer? |
gamma rays |
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Which part of the electromagnetic spectrum can be used tolook inside bodies? |
X-rays |
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H How are radio waves produced? |
by oscillations in electrical circuits |
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H How are radio waves detected? |
They produce oscillations in circuits attached to an aerial |
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H Why do radio waves sometimes have a longer range thanmicrowaves? |
refraction in the atmosphere |
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Which transfers the most energy: red, green or violet light? |
violet |
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Which part of the electromagnetic spectrum is used tosterilise surgical instruments? |
gamma rays |
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Which part of the electromagnetic spectrum is used to examineluggage in airports? |
X-rays |
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Which part of the electromagnetic spectrum is used tosterilise water? |
ultraviolet |
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Which part of the electromagnetic spectrum do fluorescentmaterials emit? |
visible light |
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Which part of the electromagnetic spectrum is produced inside many low energy light bulbs? |
ultraviolet |
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Which part of the electromagnetic spectrum is emitted byradioactive materials? |
gamma rays |
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Which part of the electromagnetic spectrum is used to makeimages of bones? |
X-rays |
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Which part of the electromagnetic spectrum can cause skincancer? |
ultraviolet |
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Which part of the electromagnetic spectrum can cook things byheating water inside them? |
microwaves |
