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Approximately how fast does light travel in air?

A. 186,000 mpg
B. 186,000 mph
C. 186,000 miles per second
D. 186,000 miles per year

Answer :

To determine how fast light travels in air, let's look at the possible options provided:

a) 186,000 mpg
b) 186,000 mph
c) 186,000 miles per year
d) 186,000 miles per second

We know that light travels extremely fast, and among the given units, the one most appropriately expressing such high speed is "miles per second."

- mpg (miles per gallon) is a measure of fuel efficiency, not speed.
- mph (miles per hour) measures speed but is too slow to describe light speed accurately.
- miles per year would be extremely slow for representing the speed of light.
- miles per second is the correct unit to measure such high velocities accurately.

Therefore, the correct answer is:

d) 186,000 miles per second

This means light travels approximately 186,000 miles every second in air.

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