Question

Huygens wave theory
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Answer 1

Answer:

When applied to the propagation of light waves, this principle states that: ... “Every point on a wave-front may be considered a source of secondary spherical wavelets which spread out in the forward direction at the speed of light. The new wave-front is the tangential surface to all of these secondary wavelets.”

Explanation:

Light always piqued the curiosity of thinkers and scientists. But it wasn’t until the late 17th century that scientists began to comprehend the properties of light. Sir Issac Newton proposed that light was made of tiny particles known as the photons while Christian Huygens believed that light was made of waves propagating perpendicular to the direction of its movement.

In 1678, Huygen’s proposed that every point that a luminous disturbance meets turns into a source of the spherical wave itself. The sum of the secondary waves, which are the result of the disturbance, determines what form the new wave will take. This theory of light is known as the ‘Huygens’ Principle’.

Answer 2

Answer:

in 1678, hygens proposed that every point to which a luminous disturbance reaches becomes a secondary source of a spherical wave; the sum of these secondary waves determines the form of the wave at any subsequent time. he assuned that the secondary waves travelled only in the 'forward direction' and it is not explained in the theory why this is the case .

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