# A plane electromagnetic wave travelling along the -direction has a wavelength of . The variation in the electric field occurs in the -direction with an amplitude . The equations for the electric and magnetic fields as a function of  and  are respectively a) b) c) d)

## Question ID - 150181 :- A plane electromagnetic wave travelling along the -direction has a wavelength of . The variation in the electric field occurs in the -direction with an amplitude . The equations for the electric and magnetic fields as a function of  and  are respectively a) b) c) d)

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 (d) Since electromagnetic wave is of transverse nature. Hence if electric field is along -axis, then magnetic field must be in -axis. Since propagation is -axis. Hence correct option is (d)

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 In Young’s double slit experiment, the separation between the slit is haled and the distance between the slits and screen is doubled.  The fringe-width will a) Be halved b) Be doubled c) Be quadrupled d) Remain unchanged