Year: 2023
Topic: Ray optics and optical instruments
Time :
1.
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). \(\displaystyle sin^{-1}\left(\frac{10t_2}{t_1}\right)\)
(2). \(\displaystyle sin^{-1}\left(\frac{t_1}{10t_2}\right)\)
(3). \(\displaystyle sin^{-1}\left(\frac{10t_1}{t_2}\right)\)
(4). \(\displaystyle sin^{-1}\left(\frac{t_2}{t_1}\right)\)