posted by mysterychicken on .
I've answered these two questions and need someone to check them for me:
1.Describe two characterisitics that light and sound have in common.
Ans- They both transfer energy [and I need help thinking of a second one]
2.Describe two ways in which light and sound are different
Ans- Light is an electromagnetic wave and it travels faster through empty space; sound is a mechanical wave and it travels faster through dense matter.
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1. An important similarity is that both have wavelike properties: a 'travelling' oscillation, with frequency, wavelength and a fixed wave speed.
2. An important difference is that light is a transverse wave and sound is a longitudinal wave (with motion back and forth along the direction of wave propagation). See http://www.kettering.edu/~drussell/Demos/waves/wavemotion.html
to see a video of the difference. With light, the transverse variation involves electric and magnetic fields, not particle motion.