IB Physics HL C 5 3 Light Doppler Approximation Topic Practice

$$\begin{aligned} v=\frac{\Delta \lambda}{\lambda} c=\frac{0.007}{100} \times 3 \times 10^{8}=21000 21 \mathrm{~km} \mathrm{~s}^{-1} \end{aligned}$$

Allow ECF for MP2.

Do not award MP1 for use of the Doppler formulas for sound and mechanical waves.