Optics Question 460

Question: The wave front of a light beam is given by the equation x+2y+3x=c (where c is arbitrary constant), then the angle made by the direction of light with the y-axis is

Options:

A) cos1114

B) sin1214

C) cos1214

D) sin1314

Show Answer

Answer:

Correct Answer: C

Solution:

[c] Here, direction of light is given by normal vector n=i^+2j^+3k^

Angle made by the n with y-axis is given by cosβ=212+22+32=214



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