A beam of light composed of red and green ray is incident obliquely at a point on the face of rectangular glass slab. When coming out on the opposite parallel face, the red and green ray emerge from:

• A

  two points preparing in two different non parallel directions
• Correct answer
  B

  two points propagating in two different parallel directions
• C

  one point propagating in two different directions
• D

  one point propagating in the same directions

Solution

Red and green rays emerge from two points propagating in two different parallel direction.

Hence, the correct answer is option: 'B'.