The table displays the velocity of light in three different states of matter.
|Material|Speed{meters/second}|
|air|300,000,000|
|water|220,000,000|
|glass|200,000,000|
When would the speed of light decrease?
a. When light transitions from water to air.
b. When light moves from air into water.
c. When light transitions from glass to air.
d. When light moves from glass to water.