DP Physics (last assessment 2024)
Question 18M.3.SL.TZ1.c.i
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.3.SL.TZ1.c.i |
| Level | SL | Paper | 3 | Time zone | TZ1 |
| Command term | Draw | Question number | c.i | Adapted from | N/A |
c.i.
[Maximum mark: 1]
18M.3.SL.TZ1.c.i
A ray of light travelling in an optic fibre undergoes total internal reflection at point P.
The refractive index of the core is 1.56 and that of the cladding 1.34.
The input signal in the fibre has a power of 15.0 mW and the attenuation per unit length is 1.24 dB km–1.
Draw on the axes an output signal to illustrate the effect of waveguide dispersion.
[1]
Markscheme
a signal that is wider and lower, not necessarily rectangular, but not a larger area
[1 mark]