C.3.3—Refractive index Topic Practice
C.3.3—Refractive index Topic Practice
Practise linking refractive index to speed, wavelength, and dispersion by using equations, graph gradients with uncertainty, and fibre transmission models.
How this is tested
- use n = c/v or wavelength ratios to calculate refractive index, and read a graph gradient with uncertainty
- explain pulse broadening with a fibre diagram by linking wavelength-dependent n to different travel times
- use the graded-index model to state that longer-path rays move faster, reducing waveguide dispersion