Question: (a) At what frequency f max does the cosmic microwave background radiation from the Big Bang have its greatest intensity? (b) Our galaxy moves at

(a) At what frequency f_max does the cosmic microwave background radiation from the Big Bang have its greatest intensity?

(b) Our galaxy moves at a speed of about 300 km/s relative to the source of the cosmic microwave background radiation, shifting f_max relative to the value found for an observer at rest relative to the source. What is the magnitude of this frequency shift?

Figure 31.13

(a) At what frequency fmax does the cosmic microwave background radiation from

Figure 31.14

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