Question

A​ light-year is the distance that light travels in one year. Find the number of miles in a​ light-year if light travels 1.86 times 10 Superscript 5 miles per second.

Answer 1

Number of miles traveled by light in a light-year is 5.952 × 10^12 miles

Step-by-step explanation:

• Step 1: Find the number of miles (distance) in a light year by using the formula for speed = Distance/Time

⇒ Distance = Speed × Time

                   = 1.86 × 10^5 × 1 yr (convert to seconds)

                   = 1.86 × 10^5 × 365 days × 24 hrs × 60 mins × 60 sec

                   = 1.86 × 10^5 × 31,536 × 10³

                   = 1.86 × 3.2 × 10^5 × 10^7

                   = 5.952 × 10^12 miles