Question

if the sun is 150 million km away from the earth, how long does it take sunlight to reach the earth?

Answer 1

Answer on Question 62031, Physics, Optics

Question:

If the Sun is 150 million km away from the Earth, how long does it take sunlight to reach the Earth?

Solution:

In order to find time that needs sunlight to reach the Earth, we divide the distance to the Sun by the speed of light and get:

$$t = \frac {d}{c} = \frac {1.5 \cdot 10^{11} \, m}{3 \cdot 10^{8} \, \frac {m}{s}} = 500 \, s.$$

Answer:

$$t = 500 \, s.$$

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