   Chapter 2, Problem 2P

Chapter
Section
Textbook Problem

# Light travels at a speed of about 3 × 103 m/s. (a) How many miles down a pulse of light travel in a time interval of 0.1 s, which is about the blink of an eye? (b) Compare this distance to the diameter of Earth.

(a)

To determine
The distance covered by light in 0.1 s

Explanation

Given info: The speed of light is 3×108m/s and time is 0.1s .

Explanation:

The formula to calculate the distance travelled by light is,

Δx=cΔt

Here,

Δt is the time taken.

Δx is the distance covered.

c is the speed of light.

Substitute 3×108m/s for c and  0.1s for Δt to find Δx .

Δt=(3×108m/s)(0

(b)

To determine
The comparison between the distance travelled by light in 0.1 s with the diameter of Earth.

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