A wavefront is represented by the plane y = 3 - x . The propagation of wave takes place at

Question

A wavefront is represented by the plane y = 3 - x . The propagation of wave takes place at, 45 ° with x - direction, 135 ° with x - direction, 60 ° with x - direction, No sufficient data

MARKS App · Accepted Answer

The propagation of ray takes place in perpendicular direction of wavefront. Here, m 1 m 2 = - 1 m 1 = s l o p e o f w a v e f r o n t = - 1 m 2 = S l o p e o f r a y - 1 m 2 = - 1 ⇒ m 2 = 1 tan ⁡ θ = 1 ⇒ θ = 45 °

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