Doppler shift for electromagnetic radiation

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Which is the best example of the Doppler shift for electromagnetic radiation?

a. Spectral lines from approaching galaxies appear at longer wavelengths

b. Receding galaxies look slightly bluish to the eye

c. Spectral lines from receding galaxies appear at longer wavelengths

d. A car’s headlight turns slightly red in color when it is approaching

e. A train’s whistle changes pitch as it passes by

Reference no: EM13308670

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