Two transparent media A and B are separated by a plane boundary. The speed of light in those media are 1.5 $\times$ 108 m/s and 2.0 $\times$ 108 m/ s, respectively. The critical angle for a ray of light for these two media is ______.

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KollegeApply · Accepted Answer

The critical angle for a ray of light for these two media is sin−1 (0.750). Explanation: rnb = `1/(sin $\theta$_c) = "Speed of light in rarer medium"/"speed of light in denser medium" 1/(sin $\theta$_c) = (2 xx 10^8)/(1.5 xx 10^8) sin $\theta$_c = 1.$\frac{5}{2}$` sin $\theta$c = 0.75 $\theta$c = sin−1 (0.75)

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