Calculating Speed of Light on a Spaceship: Earth Relative vs. Spaceship Relative

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SUMMARY

The discussion centers on calculating the speed of light emitted from a flashlight on a spaceship traveling at 7.52 x 107 m/s. According to the postulates of Special Relativity, the speed of light remains constant at approximately 299,792,458 m/s regardless of the observer's frame of reference. Therefore, the light ray's speed relative to the spaceship is 299,792,458 m/s, while its speed relative to Earth is also 299,792,458 m/s, demonstrating that light's speed is invariant in all inertial frames.

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Homework Statement


You're riding a fast spaceship going 7.52 x 107m/s and you turn on your flashlight. What's the speed of the light ray relative to the spaceship? What is its speed relative to the earth?


Homework Equations





The Attempt at a Solution



Deeply confused
 
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Hint: Consider the postulates of Special Relativity. (You should be able to answer the questions immediately with no calculation.)
 

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