Problem 19.28

กำหนดให้ \(Δλ = 1.213 pm, m_{0} \approx 9.11\times 10^{-31} kg, c \approx 3\times 10^{8} m/s\)

และ \(h \approx 6.626\times 10^{-34} J·s\)

จาก \(Δλ = \frac{h}{m_{0}c}(1 - \cos \theta )\)

\(1 - \cos \theta =\frac{m_{0}c\Delta \lambda}{h}\)

\(\theta = \cos ^{-1}(1 -\frac{m_{0}c\Delta \lambda}{h})\)

\(\theta = 60.0° \;\blacksquare\)