Answered

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(a) does your bathroom mirror show you older or younger than your actual age? (b) compute an orderof-magnitude estimate for the age difference, based on data you specify.

Sagot :

Answer:

a) Bathroom mirror shows the person younger than the actual age.

b) I stand about 47 m from my bathroom mirror

Reason:

a) Light takes a finite time to travel from the object to the mirror and then to the eye. Thus the speed of light in air is approximately equal to 3×108m/s 3 × 10 8 m/s. So the light takes approximately 7 nanoseconds to reflect off the mirror and return to our eyes.

b) This means that the reflection we see in the mirror has an age difference on the order of 10−9 seconds younger than ourselves.

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