On a glass plate a light wave is incident at an angle of 60°. If the reflected and the refracted waves are mutually perpendicular, the refractive index of material is

Question:

Options :

(a) √3/2
(b) √3
(c) 3/2
(d) 1/√3

Answer :

(b) √3

Answer Steps :

step 1

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Forty electric bulbs are connected in series across a 220 V supply. After one bulb is fused, the remaining 39 are connected again in series across the same supply. The illumination will be

If a body is executing simple harmonic motion then

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