If the critical angle for total internal reflection from a medium to vacuum is 45^ , then velocity of light in the medium is [NEET 2020]

Question

Accepted Answer

Correct answer: B. (b) Critical angle, i_c=45^ We know that, = 1 sini_C= 1 sin45^ = 1 1 2= 2 ⇒ = 2 ⇒ Velocity of lig ht in air Velocity of light in medium= 2 ⇒ 3 10^8v_m= 2 ⇒v_m= 3 2 10^8 m/s

$If the critical angle for total internal reflection from a medium to vacuum is 45^{\circ}, then velocity of light in the medium is [NEET 2020]$

Solution

More Ray Optics PYQs