Question

According to Huygens theory of
double refraction, every point in a double
refracting medium is a source of ------
type of wave front.
Answer
A. one
B. Two
C. Three
D. Four​

Answer 1

Explanation:

c) 3 is the answer.. thanks for question

Answer 2

The correct answer is option (B.) Two.

Explanation:

• According to Huygen's theory, a point in a doubly refracting or birefringent crystal produces 2 types of wavefronts.
• The wavefront corresponding to the O-ray is spherical wavefront.
• The ordinary wave travels with same velocity in all directions and so the corresponding wavefront is spherical.
• The new wave front is tangent to all of the wavelets.