Camera on Spacecraft Moving Near Speed of Light

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SUMMARY

A spacecraft moving near the speed of light equipped with a camera will present unique visual phenomena to observers on Earth. The camera, operating within the spacecraft's reference frame, captures images at normal speed, while Earth observers perceive the footage in slow motion due to relativistic effects. This paradox arises from the differences in time dilation and the Doppler effect, as discussed in the provided links. Additionally, the foreshortening of the spacecraft affects the visual representation, ensuring that images appear normal both onboard and to Earth observers.

PREREQUISITES
  • Understanding of special relativity principles
  • Familiarity with time dilation and the Doppler effect
  • Basic knowledge of frame of reference in physics
  • Awareness of relativistic effects on light and motion
NEXT STEPS
  • Research the implications of time dilation in special relativity
  • Study the Doppler effect in the context of relativistic speeds
  • Explore the concept of frame of reference in physics
  • Investigate the visual effects of foreshortening in high-speed motion
USEFUL FOR

Physicists, educators, students of relativity, and anyone interested in the effects of high-speed motion on visual perception.

JSGandora
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If a spacecraft moving near the speed of light has a camera set up inside observing the people in the spacecraft , and the camera is connected to a computer on Earth so that observers on Earth could watch the video that the camera sends, what would the people on Earth see? Would they see the people on the spacecraft in slow motion?

I find this paradoxical because the camera, which is an observer in the reference frame of the moving spacecraft should see the observers moving at normal speeds but observers on Earth (without the aid of the camera) see the people on the spacecraft moving in slow motion. But with the aid of the camera, the observers on Earth shouldn't see what the camera sees because otherwise by the time the spacecraft returns to Earth, there would be a time difference between what the camera sees and what the observers on Earth experience.
 
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DaleSpam explained the frame rate issue.
Another issue is the foreshortening of the spacecraft . Since the camera is also foreshortened (from the Earth viewpoint), the images it collects will appear normal - both on the ship and on Earth.
 

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