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A light wave is propagating with plane wave fronts of the type \(\mathrm{x}+\mathrm{y}+\mathrm{z}=\) constant. The angle…

Q1

A light wave is propagating with plane wave fronts of the type \(\mathrm{x}+\mathrm{y}+\mathrm{z}=\) constant. The angle made by the direction of wave propagation with the x -axis is :

[JEE Main 2025, 2 Apr (Shift 1)]

a

\({\cos }^{-1}\left(\frac{1}{\sqrt{3}}\right)\)

b

\({\cos }^{-1}\left(\frac{2}{3}\right)\)

c

\({\cos }^{-1}\left(\frac{1}{3}\right)\)

d

\({\cos }^{-1}\left(\sqrt{\frac{2}{3}}\right)\)

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