일반물리학 2 — Relativity: Problem 8

8 A sodium light source moves in a horizontal circle at a constant speed of 0.200c while emitting light at the proper wavelength of \(\lambda_0 = 589.00 \text{ nm}\). Wavelength \(\lambda\) is measured for that light by a detector fixed at the center of the circle. What is the wavelength shift \(\lambda - \lambda_0\)?