Question

8. Huygen's wave theory says light is a form of
(a) Particle
(b) Wave
(c) Both (a) and (b)
(d) None of these
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Answer 1

And : Huygen's wave theory says light is a form of wave. Because every point on a wave - front may be considered a source of secondary spherical wavelets which speed out in the forward direction at the speed of light. The wave - front is the tangential to surface all of these secondary wavelets.