How far does light travel in a century?

Question

Quizplus · Accepted Answer

The speed of light is approximately 3 × 10^8 m/s. To find out how far light travels in a century (100 years), we need to multiply its speed by the time it travels:

3 × 10^8 m/s x 60 sec/min x 60 min/hr x 24 hr/day x 365 days/year x 100 years

When we solve this equation, we get:

= 9.46 × 10^17 meters

which is approximately equal to 9.5 × 10^17 meters, or 9.5 × 10^15 kilometers.

Therefore, the best choice is (B), 9.5 × 10^17 meters.

How Far Does Light Travel in a Century