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Explorations an Introduction to Astronomy Thomas T. Arny | ||||||||
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Chapter 3, Figure 18
Figure
3.18
(A) The Doppler shift: waves appear to shorten as a source approaches and lengthen as it recedes. (B) Doppler shift of sound waves from a passing car. (C)Doppler shift of radar waves in a speed trap. (D) A Slinky illustrates the shortening of the space between its coils as its ends move toward each other and a lengthening of the space as the ends move apart.
