word problem

[jerzey]

the diameter of the milky way disc is approximately 9*10^20 meters. How long does it take light travelling at 10^16 m/year to travel accross the diameter of the milky way

 

[tkhunny]

the diameter of the milky way disc is approximately 9*10^20 meters. How long does it take light travelling at 10^16 m/year to travel accross the diameter of the milky way

Isn't that a division problem?

(9*10²⁰ m)/(10¹⁶ m/yr) = 9*10⁴ yr

 

[Guest]

New concept also in how fast light can travel. I know that the speed of light is no longer a constant but light going at 10^16m/yr--wow that is quick.

 

[Denis]

New concept also in how fast light can travel. I know that the speed of light is no longer a constant but light going at 10^16m/yr--wow that is quick.

Looks ok to me, apm: that's meters, not miles.

speed of light = 299 792 458 meters per sec.

comes out to 9 460 730 472 580 800 (close to 10^16).
...I used 365.25 days