Mazumeshi Elf to Yuboku gurashi - Vol. 5 Ch. 27 - Everyone’s Outing

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Did he seriously try to explain the concept of the speed of light to a pre-industrial society?
 
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He should stick to cooking and leave the natural science teaching to somebody else.
 
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so, can people who move at speed of light see their reflection on the mirror?
 
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@tettra

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If you accept the speed of light as a universal hard limit, then you wouldn't see your reflection, as the "light" from your body wouldn't be able to advance fast enough to ever reach the mirror to be reflected

If you don't accept the speed of light as a hard limit, then you would see your reflection, as the relative speed between you and the mirror is zero, so the light from your body would be moving at twice the speed of light. And as photons technically have a non-zero mass, they should be influenced by momentum.
 
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If you are driving 30 mph and throw a ball out the window with a speed that from your point of view is going 10 mph faster than your car a stationary observer would see the ball going 40 mph, the 30 mph of the car plus the 10 mph of your throw.

Now let's change the car into a rocket going 1/2 the speed of light and you shine a flashlight out the front window of the rocket you will see light moving away from you at the speed of light.

For a stationary observer you would think that the light of the flashlight would be traveling at 1 and 1/2 times the speed of light but it looks like the light is traveling at the speed of light.

This is caused because the speed of light in a vacuum is a constant regardless of the speed of the observer. What happens instead is that as you approach the speed of light the time you experience begins to slow down relativeto the time of a stationary observer.

This was actually proven by putting an atomic clock on a plane and flying around the world. When the clock on the plane was compared to an atomic clock on the ground the one on the plane was slightly off.

Anyway this has been me trying to explain relativity to the mangadex comment section

TL:DR
The speed of light is a constant regardless of your speed.
 
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You don't see your reflection in a mirror at speed of light, you don't see light reflection in any surface at that speed, only darkness and a small point of light that is the closest source of all light, that is the sun.
 

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