Question

Huygens principle of secondary waves

• A. allow us to find the focal length of a thick convex lens.
• B. give us the magnifying power of the microscope.
• C. is a geometrical method to find, the position of a wave front.
• D. is used to determine the velocity of light.

Answer 1

The correct option is C is a geometrical method to find, the position of a wave front.

Huygens's Principle states that every point on a wavefront is a source of secondary wavelets, which spread forward at the same speed.

Thus is enables to find the position of wavefront.