Question
The critical angle for a denser-rarer interface is $45^{\circ}$. The speed of light in rarer medium is $3 \times 10^{8} \mathrm{~m} / \mathrm{s}$. The speed of light in the denser medium is:
The critical angle for a denser-rarer interface is $45^{\circ}$. The speed of light in rarer medium is $3 \times 10^{8} \mathrm{~m} / \mathrm{s}$. The speed of light in the denser medium is: