NEETPhysicsRay Optics
A ray of monochromatic light is incident on the plane surface of separation between two media (X ) and (Y ) with angle of incidence 'i' in medium (X ) and angle of refraction ' (r ) ' in medium (Y ). The given graph shows the relation between sin (i ) and ( r ). If (V_x ) and (V_ Y ) are the velocities of the ray in media (X ) and (Y ) respectively, then which of the following is true?
Options
- A(V_X= 1 3 V_Y )
- B( V _ X = 3 ~V _Y )
- CTotal internal reflection can happen when the light is incident in medium (X ).
- D(v_X= 3 v_Y ), where (v_X ) and (v_Y ) are frequencies of the light in medium (X ) and (Y ) respectively.
Correct answer
B. ( V _ X = 3 ~V _Y )
Step-by-step solution
Hint : ( aligned & ₁ i= ₂ r & C V_X i= C V_Y r & i r = V_X V_Y = 3 & V_Y= V_X 3 & V_X= 3 V_Y aligned ) (y=m x ) ( r= ( 30^ ) i ) ( i r = 1 30^ = 3 1 )