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As a high-speed spaceship flies past you, it fires a strobe light that sends out a pulse of light in all directions. An observer aboard

As a high-speed spaceship flies past you, it fires a strobe light that sends out a pulse of light in all directions. An observer aboard the spaceship measures a spherical wave font that spreads away from the spaceship with the same speed c in all directions. (a) What is the shape of the wave front that you measure? (b) According to you, is the wave front centered on the spaceship

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