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Chapter 29: Problem 20

Roughly how long does it take light to travel 1 foot?

Short Answer

Expert verified
Light takes approximately 1.01670336 nanoseconds to travel 1 foot.

Step by step solution

01

Know the Speed of Light

The speed of light is a well-known constant, which is approximately \(299,792,458\) meters per second or in units more directly applicable to the problem at hand, roughly \(983,571,056\) feet per second.
02

Apply Physics Formula

The formula relating distance, speed and time is: time = distance / speed. The given distance is 1 foot. So by substituting the speed of light in the formula, we get: time \( = \frac{1}{983,571,056}\) seconds.
03

Calculate and Convert to Nanoseconds

The resultant time will be very small and is generally represented in nanoseconds. So, calculate the time and then convert it to nanoseconds. 1 second is equal to \(1,000,000,000\) nanoseconds. Therefore, Time \(=\frac{1}{983,571,056} \times 1,000,000,000\) nanoseconds.

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