Question

Suppose a star is 7.17 ✕ 1018 m from earth. imagine a pulse of radio waves is emitted toward earth from the surface of this star. how long (in years) would it take to reach earth?

Answer 1

It would take approximately 23,900,000 years for the pulse of radio waves to reach Earth from the star.

Step-by-step explanation:

To calculate the time it takes for a pulse of radio waves to reach Earth from a star, you can use the formula:

time = distance / speed of light

Given that the star is 7.17 x 10^18 m away from Earth, and the speed of light is approximately 3 x 10^8 m/s, we can calculate the time:

time = (7.17 x 10^18 m) / (3 x 10^8 m/s)

which simplifies to:

time ≈ 23,900,000 years

Therefore, it would take approximately 23,900,000 years for the pulse of radio waves to reach Earth from the star.