A ray of light incident on a glass sphere (refractive index √3) suffers total internal reflection before emerging out exactly parallel to the incident ray. The angle of incidence was

Question:

Options :

(a) 75 degree
(b) 30 degree
(c) 45 degree
(d) 60 degree

Answer :

(d) 60 degree

Answer Steps :

step 1

step 2

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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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