8. The speed of light is 3times 10^8m/s How far will an electromagnetic wave (light) trave in one year (answer in meters). This distance is known as a lightyear. Conversions: 1 year =365 days 1day=24hours 1 hour = 60 min 1min=60s

Here's how to calculate the distance light travels in one year:<br /><br />1. **Calculate the number of seconds in a year:**<br /><br />* Seconds in a minute: 60 s<br />* Seconds in an hour: 60 min/hour * 60 s/min = 3600 s/hour<br />* Seconds in a day: 24 hours/day * 3600 s/hour = 86400 s/day<br />* Seconds in a year: 365 days/year * 86400 s/day = 31,536,000 s/year<br /><br />2. **Calculate the distance light travels in one year:**<br /><br />* Distance = Speed x Time<br />* Distance = (3 x 10⁸ m/s) * (31,536,000 s)<br />* Distance = 9.4608 x 10¹⁵ meters<br /><br />Therefore, light travels approximately 9.4608 x 10¹⁵ meters in one year. This distance is known as a light-year.<br />