Question

The speed of light in a vacuum is 186,000 miles per second. If the speed of light in glass is 124,000 miles per second, what is the ratio of the speed of light in glass to the speed of light in a vacuum? Express your answer as a common fraction.

Answer 1

2/3

Step-by-step explanation:

Answer 2

The ratio of the speed of light in glass to the speed of light in a vacuum is 2:3.

Step-by-step explanation:

Given that,

Speed of light in vacuum = 186000 miles/sec

Speed of light in glass = 124000 miles/sec

We need to calculate the ratio of the speed of light in glass to the speed of light in a vacuum

The ratio of speed of light in glass to the vacuum

`(v_(g))/(v_(a))=(124000)/(186000)`

Where,
`v_(g)` = speed of light in vacuum

`v_(a)` = speed of light in vacuum

`(v_(g))/(v_(a))=(2)/(3)`

Hence, The ratio of the speed of light in glass to the speed of light in a vacuum is 2:3.