The speed of light in a medium whose critical angle is 60° will be

$2.6 × 10^8 m/s$ $1.5× 10^8 m/s$ $3 × 10^8 m/s$ $2 × 10^8 m/s$

$2.6 × 10^8 m/s$

The correct answer is Option (1) → $2.6 × 10^8 m/s$