Q: Light waves are incident on an air-glass boundary. Some of the light waves are reflected and some are refracted in the glass. Which one of the following properties is the same for the incident wave and the refracted wave?
(a)Speed
(b)Direction
(c)Brightness
(d)Frequency
Correct Answer: (d)
The correct answer is (a) 'Speed'. This question from the Science & Technology domain tests knowledge of Physics.