Question

A certain star is 1.135 × 10^14 km away from Earth. If light travels at 9.4607 × 10^12 km per year, how long will it take for light from the star to reach Earth?

Answer 1

Answer:

12 years will it take for light from the star to reach Earth.

Step-by-step explanation:

As per the given statement: A certain star is 1.135 × 10^14 km away from Earth. If light travels at 9.4607 × 10^12 km per year.

⇒Speed of light travel = $9.4607 \times 10^{12}$ km per year

and Distance of a certain star from the Earth = $1.135 \times 10^{14}$ km

To find how long will it take for light from the star to reach Earth.

Using Formula:

$\text{Speed} = \frac{\text{Distance}}{\text{Time}}$

or

$\text{Time} = \frac{\text{Distance}}{\text{Speed}}$

Substitute the given values we have;;

$\text{Time} = \frac{1.135 \times 10^{14}}{9.4607 \times 10^{12}}$

Simplify:

Time = 11.9969981 year ≈ 12 years

therefore, 12 years will it take for light from the star to reach Earth.