STANDING WAVES AND DIFFRACTION

STANDING WAVES

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STANDING WAVES

• Is caused by the constant constructive and destructive interference of two waves traveling towards each other

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WHO CARES?

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STANDING WAVE

• Demo- Standing wave string

• You try- slinky with a partner

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DIFFRACTION• Def’n- Waves can ‘bend’ in a rather unusual way

when they reach the edge of an object

• The amount of diffraction ('spreading' or 'bending' of the wave) depends on the wavelength and the size of the object

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DIFFRACTION

• White light can diffract and be separated into its different colours

• It is also how we can see a lunar eclipse, the sun’s light rays bend around the moon allowing us to still see it occuring

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SEE DIFFRACTION IN ACTION

• http://www.acoustics.salford.ac.uk/feschools/waves/diffract.php#diffraction

• http://www.asseenontv.com/msa-30x-sound-amplifier-discreet-sound-amplifier/detail.php?p=448979

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