Physic (keywords) 0.0 / 5 ? PhysicsKey wordsGCSEEdexcel Created by: Jess_Peacock_Created on: 20-02-15 18:31 Geocentric Earth at the centre of the universe 1 of 8 Heliocentric Sun at the centre of the universe 2 of 8 Frequency Number of waves per seconds measured in hertz 3 of 8 Refraction When light travels in straight lines and it can change direction 4 of 8 Focal length The difference between the focus and the lenswa 5 of 8 Wavelength= Wave speed÷ frequency 6 of 8 Frequency= Wave speed÷ wave length 7 of 8 Wave speed= Wavelength× freqency 8 of 8
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