Qu No. Extra Information Marks 7.1 (for both fibres) increasing the wavelength 1 of light decreases and then increases the 1 percentage / amount of light transmitted 1 (for both fibres) the minimum transmission happens at 5 (x 10-7 metres) the shorter fibre transmits a greater percentage of light (at the same wavelength) 7.2 f = c / 1 λ = 6 x 1014 Hz 1 7.3 Light refracts at boundary between cladding 1 and core 1 Light changes speed/ slows down in Do not allow speeds up cladding Qu No. Extra Information Marks 8.1 A and C or B and D 1 Only one (independent) variable or different 1 shapes but the same colour 8.2 B radiates faster / B is a better emitter (of 1 heat) 1 But B has a smaller (surface) area / B has a smaller (surface) area: volume ratio
Qu No. Extra Information Marks 7.1 (for both fibres) increasing the wavelength of light decreases and then increases the percentage / amount of light transmitted (for both fibres) the minimum transmission happens at 5 (x 10-7 metres) the shorter fibre transmits a greater percentage of light (at the same wavelength) 1 1 1 7.2 f = c / λ = 6 x 1014 Hz 1 1 7.3 Light refracts at boundary between cladding and core Light changes speed/ slows down in cladding Do not allow speeds up 1 1 Qu No. Extra Information Marks 8.1 A and C or B and D Only one (independent) variable or different shapes but the same colour 1 1 8.2 B radiates faster / B is a better emitter (of heat) But B has a smaller (surface) area / B has a smaller (surface) area: volume ratio 1 1
Physics_Separate_Waves.docx