You are traveling in a spaceship, headed towards Earth, and you hold a ball at arm's. When you let go of the ball, it falls to the floor as shown in the picture. What does this observation tell you about the acceleration of the spaceship? If you shine a white light out of the window of the spaceship towards Earth, at what speed will the light appear to travel and why? What colour will the light appear to be to observers on Earth, and why?

You are traveling in a spaceship, headed towards Earth, and you hold a ball at arm's. When you let go of the ball, it falls to the floor as shown in the picture. What does this observation tell you about the acceleration of the spaceship? If you shine a white light out of the window of the spaceship towards Earth, at what speed will the light appear to travel and why? What colour will the light appear to be to observers on Earth, and why?

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