Velocity Addition: a Star Is Moving Towards the Earth with a Speed

question 33

Multiple Choice

Velocity addition: A star is moving towards the earth with a speed at 90% the speed of light. It emits light, which moves away from the star at the speed of light. Relative to us on earth, what is the speed of the light moving toward us from the star?

• A) 0.90c
• B) c
• C) 1.1c
• D) 1.20c
• E) 1.9c

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Definitions:

Anesthetics

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Drugs or substances specifically used to relieve pain, ranging from over-the-counter analgesics to prescription opioids.

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A surgical procedure used to deliver a baby through incisions made in the mother's abdomen and uterus.