Question

Radio waves travel at the speed of light, which is 3.00 u 108 m/s. How many kilometers will radio messages travel in exactly one year?

Answer 1

Answer:                

Distance traveled will be $9.462\times 10^{12}km$

Explanation:

We have given speed of the light $v=3\times 10^8m/sec$

We have to find the distance traveled by light in 1 year

We know that 1 year = 8760 hour

And 1 hour = 60×60 = 3600 sec

So 1 year $=8760\times 3600=3.154\times 10^{7}sec$

We know that distance = speed × time

So distance traveled by light in one year $=3.154\times 10^7\times 3\times 10^8=9.462\times 10^{15}m$

We have to fond the distance in km

As we know that 1 km = 1000 m

So $9.462\times 10^{15}m=\frac{9.462\times 10^{15}}{1000}=9.462\times 10^{12}km$

Answer 2

Answer:

9.46 x 10^15 m

Explanation:

speed, v = 3 x 10^8 m/s

time, t = 1 year = 1 x 365 x 24 x 3600 s = 31536000 s

distance = velocity x time

d = 3 x 10^8 x 31536000

d = 9.46 x 10^15 m

Thus, the distance is 9.46 x 10^15 m.