[单选题]
When a distant source emits light of a particular2w awsxgeur00(-g5h3a 8yxhl wave9z xt;df it(jkk c.ld/b+g8c;length in the visible, and the source is moving away from us, the color of the light appeark ltk9 d;b(f.8;/izcjgxd +tcs to us to be shifted toward the
A. red end of the visible spectrum.
B. blue end of the visible spectrum.
Post time 2024-1-22 00:41:59