Answer & explanation
Correct answer: option 2
Refractive index $\mu = \frac{1}{sin 30^o} = 2$
Speed of light in the medium is $ v = \frac{c}{\mu} = \frac{3 \times 10^8}{2} = 1.5 \times 10^8$
Correct answer: option 2
Refractive index $\mu = \frac{1}{sin 30^o} = 2$
Speed of light in the medium is $ v = \frac{c}{\mu} = \frac{3 \times 10^8}{2} = 1.5 \times 10^8$