Question

The speed of light is around 3.000E5 km/s. It takes approximately 9.221 seconds for light reflected from the moon Vega to reach planet Xartan. What is the average distance from the moon Vega to the planet Xartan?

Answer 1

Answer:

$d=2.77\cdot 10^6\ Km$

Explanation:

Speed

The speed is calculated as the ratio of the distance d by the time t:

$\displaystyle v=\frac{d}{t}$

If we need to calculate the distance, the equation is solved for d:

d=v*t

The speed of light is

$v=3\cdot 10^5\ Km/s$

It takes t=9.221 seconds for light reflected from the moon Vega to reach planet Xartan.

We can calculate the average distance the light traveled:

$d=3\cdot 10^5\ Km/s*9.221$

$d=2,766,300\ Km$

Or, in scientific notation:

$\mathbf{d=2.77\cdot 10^6\ Km}$