calculate the time it takes light to travel from the Sun to the Earth.

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 Light travels at a constant speed of 3.0 x 105km/s.

The distance between the Sun and the Earth is about 1.5 x 108km.

Express your result with the appropriate number of significant figures.

Mar 6th, 2015

d=vt

d=1.5 x 10^8 km

v=3.0 x 10^5 km/s

So t=d/v=1.5 x 10^8 / 3.0 x 10^5=0.5 x10^3=5.0 x 10^2 s

Therefore it takes light 5.0 x 10^2 s to travel from the Sun to the Earth.

Mar 6th, 2015

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