Year 9 Physics - Sound and Light
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22 Terms
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Electromagnetic radiation varies both
________ relative to frequency and wavelength.
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Electromagnetic waves
________ vary due to their wavelength, as this relates to the amount of energy transferred.
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EMR
________- shows wave- like properties as it travels through space, and moves in a straight line.
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light
a type of energy that travels in waves
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the only type of electromagnetic radiation humans can see
visible light
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all electromagnetic waves travel at the speed of
light
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short wavelength means
high energy
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long wavelength means
low energy
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xrays have
shorter wavelengths and higher energy than light
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microwaves have
longer wavelengths and lower amounts of energy than light
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EMR stands for
electromagnetic radiation
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electromagnetic radiation varies relative to
frequency and wavelength
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light is
a type of radiation
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radiation is
any type of energy given off by objects as waves or particles
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the full spectrum of radiation is the
electromagnetic spectrum
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EMS stands for
electromagnetic spectrum
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EMR can move through
vacuums at the speed of light
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sound that is too high for us to hear is
ultrasound
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pitch corresponds to _
frequency
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we use _ to measure noise
decibels
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decibels are __
logarithmic
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human range of pitch we can hear
20 - 20,000 Hz