Question

speed of light?
speed of shadow?​

Answer 1

Answer:

The speed of light is 186,000 miles per second (299,338 kilometers per second). So if it takes you less than half a second to move your hand that distance, then that shadow will have "broken" the speed of light.

Explanation:

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Answer 2

Answer:

• The speed of light is 186,000 miles per second (299,338 kilometers per second). So if it takes you less than half a second to move your hand that distance, then that shadow will have "broken" the speed of light.

• Assuming you're 174 cm tall, the distance between your head and the ground that light has to travel is about 246 cm (applying the Pythagorean theorem). Dividing this by the speed of light we get that the shadow of your head appears in about 8.2 nanoseconds.

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