Physics · PYQ NEET UG 2023

Light travels a distance \( x \) in time \( t_1 \) in air and \( 10x \) in time \( t_2 \) in another denser medium. What is the critical angle for this medium?

1. A
   \( \sin^{-1}(\frac{10t_1}{t_2}) \)
2. B
   \( \sin^{-1}(\frac{10t_2}{t_1}) \)
3. C
   \( \sin^{-1}(\frac{t_1}{10t_2}) \)
4. D
   \( \sin^{-1}(\frac{t_2}{10t_1}) \)