Question

Light travels at a speed of 3.0 × 105 kilometers per second. If the distance between Neptune and the sun is about 4.5 × 109 kilometers, approximately how long does it take for light to travel from the sun to Neptune?

A. 1.5 × 104 seconds
B. 1.5 × 1014 seconds
C. 13.5 × 104 seconds
D. 13.5 × 1014 seconds



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Answer 1

The right answer is  " A.1.5* 10^4 seconds"

Step-by-step explanation:

Travelling speed of light = 3.0 * 10 ^ 5 km/s

Distance between Neptune and the sun = 4.5 * 10 ^ 9 km

Time taken for this travel = Distance / speed

            = 4.5 * 10^9 / 3 * 10 ^5

            = 1.5 * 10 ^ 4

Light to travel from the sun to Neptune = 1.5 * 10 ^ 4 seconds.

               

Answer 2

Answer:

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