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Soloha48 [4]
3 years ago
10

Light travels at a speed of about 3.0 108 m/s. (a) how many miles does a pulse of light travel in a time interval of 0.1 s, whic

h is about the blink of an eye? Δx = 3 mi (b) compare this distance to the diameter of earth. (use 6.38 106 m for the radius of the earth.) δx de =
Physics
1 answer:
babunello [35]3 years ago
4 0

Speed of light is given as

c = 3 * 10^8 m/s

time interval is given as

\Delta t = 0.1 s

so the distance covered by the light is given as

d = v * \Delta t

d = 3 * 10^8 * 0.1 = 3 * 10^7 meter

now as we know that

1 mile = 1609 meter

so the distance moved by light is

d = \frac{3 * 10^7}{1609} = 18645.12 miles

now for the comparision of this distance with diameter of earth

as we know that radius of earth is

R = 6.38 * 10^6 m

so the diameter of earth will be

d = 2R = 12.76 * 10^6 m

now the ratio of diameter with the distance that light move will be

\frac{distance}{diameter} = \frac{3 * 10^7}{12.76 * 10^6}

\frac{distance}{diameter} = 2.35

<em>so it is 2.35 times more than the diameter of earth</em>

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