Why do lasers produce an intense coherent beam of light?
The waves are in phase with one another and have the same frequency
3 of 15
what is diffraction in wave terms?
when waves change direction after spreading out and going through a gap
4 of 15
give an example of a transverse wave
s- type earthquake wave
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what is the 4th wave in the electromagnetic spectrum?
visible light
6 of 15
how does double glazing save energy?
the panes of glass trap the heat in between them preventing conduction from happening.
7 of 15
what is the inosphere?
an electrically charged layer in the earths atmosphere allowing longer wavelengths to be reflected and alowing radio and tb to be transmitted between different places on earth.
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what is heat?
a measurement of energy on an absolute scale
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whats shc?
the energy needed to change the temperature of 1kg of a substance by 1 degree celcius
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what are the best emitters and absorbers?
dull and black
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what is infared absorbed by
particles on the surface of the food increasing their energy
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what does the ozone layer do?
protects the earth from UV radiation
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what are p waves proof of?
the structure of the earths layers
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what are s waves proof of?
the structure of the earths outer core
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Other cards in this set
Card 2
Front
what is the equation to calculate wave speed?
Back
frequency x wavelengh
Card 3
Front
Why do lasers produce an intense coherent beam of light?
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