2-D And 3-D Wavefronts

Question 1

Wavefront

Answer 1

And imaginary line joining points on a wave that are in phase

Question 2

Huygen’s principal

Answer 2

Every point of a wave front serve as a point source of spherical, secondary waves that move forward with the same speed as the wave

Question 3

Diffraction

Answer 3

The ability of a wave to spread out in wave France as the wave passes through a small aperture or around a sharp edge