Q. Light waves travel in vacuum along the $y$ – axis. Which of the following may represent the wavefront?
A) $y$ = constant
B) $x$ = constant
C) $z$ = constant
D) $x + y + z$ = constant
Explanation
(a) As velocity of light is perpendicular to the wavefront, and light is travelling in vacuum along the$y - axis$, therefore, the wavefront is represented by$y = constant$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.