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Would it be possible to write a program that can make an image, lets say a circle the size of a dime, move across your computer screen back and forth at the speed of light having a monitor that is lets say 20 inches wide; if not, then would it be possible to make the image move across the screen at 50 or 100 mph??
The speed of light is 299,792,458 meters per second. Your screen is about half a meter across, and refreshes about 60 times a second. In a single refresh of the screen, your dime would’ve had to have crossed the screen five million times.
You can simulate this, though. Just draw a dime-height horizontal bar across the screen.
50 mph is 22.352 meters per second, so you’re not going to see anything particularly useful at that speed either.