Question
Question: Which of the following is correct for the beam which enters the medium?...
Which of the following is correct for the beam which enters the medium?
A
Travel as a cylindrical beam
B
Diverge
C
Converge
D
Dover near the axis and converge near the periphery
Answer
Converge
Explanation
Solution
: Since the refractive index is less at the beam boundary, the ray at the edges of the beam move faster compared to the axis of beam. Hence, the beam converges.