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23 Nov 2019

Light travels at a speed of about 3.00 x 108 m/s.

(a) How many miles does a pulse of light travel in a timeinterval of 0.100 s, which is about the blink of an eye

(b) Compare this distance to the diameter of Earth. (Find theratio of the distance the light travels to the diameter ofearth.2

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Casey Durgan
Casey DurganLv2
2 Apr 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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The speed of light in a vacuum is exactly 299,792,458 m/s. This speed is sometimes used to provide a convenient yardstick for large astronomical distances. (a) A light-second is the distance light travels in one second. If the Moon is 3.84ร—108 m from the Earth (center to center), how many light-seconds away is it? (b) A light-minute is the distance light travels in one minute. If the Earth is 1.50ร—1011 m from the Sun, how many light-minutes away is it? (Your answer also represents the number of minutes it takes for light to reach the Earth from the Sun.) (c) A light-year is the distance light travels in one year. The Sun is 28,000 light-years from the center of the Milky Way galaxy. What is this distance in meters?

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