Question

Light travels at a speed of 3.0 x 108 m/s (meters per second). How can you use this information to calculate the time in seconds it takes for light from Proxima Centauri to reach Earth? How many seconds does it take? Write your answer in scientific notation.

Answer 1

Answer:

The Time taken for the light to reach the earth from

Proxima Centuri is $1.338*10^{8}$seconds

Step-by-step explanation:

The distance of Proxima Centauri from earth in meters is;

distance(d)=$4.014*10^{16}meters$

The speed of light in meters is;

speed (s)=$3*10^{8} m/s^{2}$

Recall formula to find time taken given distance and speed;

Time(T)=$\frac{distance(d)}{Speed(s)}$

time taken=$\frac{4.014*10^{16}}{3*10^{8} } }$

time taken=$1.338*10^{16-8}$

Time taken(T)=$1.338*10^{8}$seconds