Light waves travel in vacuum along the X-axis. Which of the following may represent the wavefronts ?
Light waves travel in vacuum along the X-axis. Which of the following may represent the wavefronts ?
(a) x = c.
(b) y = c.
(c) z = c.
(d) x + y + z = c.
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The correct answer is (a) x = c.
EXPLANATION:
The wavefronts are perpendicular to the direction of the light. Since here the light is traveling along X-axis, the wavefront will be a plane perpendicular to the X-axis. Out of the four options only (a) represents a plane perpendicular to X-axis.
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