A star is moving at 02c along the x axis the star is moving, Ask an Expert

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A star is moving at 0.2c along the x axis. The star is moving away from observer A and toward observer B..The star emits light with a maximum intensity at wavelength 500nm.

(a) Calculate the spacing between wave crests for emitted light with ?= 500nm ahead of the star and behind it in the star's frame of reference..

(b) Transform these lengths to the observers' frame of reference.

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