How does light slide sideways?

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    Laser Light Slide
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The discussion centers on the mechanics of laser ranging to the moon, questioning how light can return to the telescope despite the moon's movement during the laser's travel time. Participants argue that the laser must be aimed at where the moon will be, not where it currently is, to account for its motion. They emphasize that the beam's width allows it to encompass the moon's movement, negating the need for light to "slide sideways." The conversation also touches on the implications of Special Relativity and the concept of motion being frame-dependent. Ultimately, the debate highlights the complexities of understanding light behavior in relation to moving celestial bodies.
  • #51
harrylin said:
it''s better to stick to physics here. :smile:
That would be a welcome change.
 

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