How Faster than Light Speed Breaks CAUSALITY and creates Paradoxes
Arvin Ash・14 minutes read
A powerful laser pointer can create a moving dot on the moon's surface faster than light by spinning it at 100 revolutions per second, but this movement does not violate the speed of light due to different photons creating the dot. Despite this, the speed limit in the universe restricts communication speed, not physical movement, as faster-than-light communication would break causality and create paradoxes, violating known physics laws.
Insights
- Different photons creating the dot on the moon's surface allow it to move faster than light without violating the speed limit, showcasing the intricate nature of light's behavior under unique conditions.
- Faster-than-light communication, while intriguing, poses a threat to causality and established physics laws, highlighting the importance of respecting the universal speed limit to maintain coherence and prevent paradoxes.
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Recent questions
How fast can a laser pointer create a dot on the moon?
In just a second, a powerful laser pointer can create a dot on the moon's surface.
Can a laser pointer move faster than light around the moon?
By spinning the laser at 100 revolutions per second, the dot can move around the moon faster than light.
Why can't astronauts on the moon use the dot for communication?
Astronauts on the moon cannot manipulate the dot for faster-than-light communication due to the speed limit in the universe restricting communication speed, not physical movement.
What is the information limit on causality based on?
The information limit on causality is due to forces causing disturbances in fields, which restrict the speed of communication.
What would happen if faster-than-light communication occurred?
Faster-than-light communication would break causality, create paradoxes, and violate known physics laws, leading to absurd implications like no light propagation.
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Summary
00:00
"Limitless Light: Speed, Communication, and Causality"
- A powerful laser pointer pointed at the moon can create a dot on its surface in a second.
- Spinning the laser at 100 revolutions per second makes the dot move around the moon faster than light.
- The dot's movement doesn't violate the speed of light as different photons create the dot.
- Astronauts on the moon can't manipulate the dot for faster-than-light communication.
- The speed limit in the universe restricts communication speed, not physical movement.
- Information limit on causality is due to forces causing disturbances in fields.
- Light particles, photons, are massless and travel at the speed of light due to field disturbances.
- Einstein's theory of special relativity is based on two postulates, not on the speed of light limit.
- Infinite speed of light would lead to absurd implications like no light propagation.
- Faster-than-light communication would break causality and create paradoxes, violating known physics laws.
