Question

If the sun is 150 million km away from the earth, how long does it take sunlight to reach the earth
0.5 s
1500 s
45 s
500 s

Answer 1

Answer on Question #47002, Physics, Optics

If the sun is 150 million km away from the earth, how long does it take sunlight to reach the earth: 0.5 s

1500 s

45 s

500 s

Solution

Speed of light is $3\cdot 10^{8}m/s$. Then $150\cdot 10^{10}$ mete it will pass in

$\frac{150\cdot 10^{10}}{3\cdot 10^{8}}=500\,s$

Hence it will take light 500 s to reach earth.

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