^{2}equation that predicted a future with nuclear bombs and atomic energy, but this is not the only surprising prediction. The theory also predicted that objects shrink when they move really fast.

^{1}After hearing a professor describe this strange and fascinating phenomenon, I wondered two things. First, what was Einstein smoking? Second, if I ran really fast, would I be able to see atoms?

**How fast does a person have to run to be atom sized?**

According to special relativity, the length of a moving object is equal to its original length times an extra factor

L' = L [1 – (v/c)

^{2}]^{0.5}.Here, c is the speed of light, L' is the length of the object when it's moving, L is the length of the object when it's not moving, and v is the velocity at which it's moving. Our new length L' will be about 10

^{-10 }m or roughly the size of an atom. Our original length will be about 1.5 m. We can solve for v

v = c [1 – (L'/L)

^{2}]^{0.5} = (3.0×10

^{8}m/s)[1 – (10^{-10 }m / 1.5 m)^{2}]^{0.5}= 0.9999999999999999999977778 c.

You would need to move

__close to the speed of light to be atom sized.__

*very*[1] This phenomenon is called "length contraction".

## No comments:

## Post a Comment