An Astronaut in an Inertial Reference Frame Measures a Time

question 23

Multiple Choice

An astronaut in an inertial reference frame measures a time interval Δt between her heartbeats.What will observers in all other inertial reference frames measure for the time interval between her heartbeats?

• A) Δt
• B) more thanΔt
• C) less than Δt
• D) The answer depends on whether they are moving toward her or away from her.

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