Question

Suppose the Sun is 1.29025 X 108 km from

Earth.
The speed of light is 2.99792 x 108 m/s.
How long does it take for its light to reach
us?
Answer in units of min.

Answer 1

It takes the Sun's light 7.17 minutes to reach us.

Step-by-step explanation:

We can calculate the time that takes the light to reach us by using the following equation:

`t = (d)/(c)`

Where:

d: is the distance = 1.29025x10⁸ km = 1.29025x10¹¹ m

c: si the speed of light = 2.99792x10⁸ m/s

Hence, the time is:

`t = (d)/(c) = (1.29025 \cdot 10^(11) m)/(2.99792 \cdot 10^(8) m/s) = 430.38 s = 7.17 min`

Therefore, it takes the Sun's light 7.17 minutes to reach us.

I hope it helps you!