Answer :

Light takes 1.5 nanoseconds from your outstretched hand to reach your eyes.

In physics, light travels through vacuum with the highest speed i.e. 3 x [tex]10^{8}[/tex] m/s.

In one second, light can travel up to 300,000 kilometers.

It means, to travel a distance of one foot or 30 centimeters, the time taken by light is 1 nanosecond.

So, in our case we can see that in order to travel from outstretched hand to your eyes, the time take by light is 1.5 nanoseconds. It is because, the distance between outstretched hand and eye is approximately 1.5 feet, therefore, light takes 1.5 nanoseconds.

If you need to learn more about light click here:

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