Q: Which one of the following statements is not correct for light rays?
(a)Light travels at different speeds in different media.
(b)Light travels at almost 300 million metres per second in air.
(c)Light speeds down as it leaves a water surface and enters the air.
(d)Light speeds up as it leaves a glass surface and enters the air.
Correct Answer: (c)
The correct answer is (a) 'Light travels at different speeds in different media.'. This question from the Science & Technology domain tests knowledge of Computer & Information Technology.