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प्रश्न
According to Huygens’s principle, the amplitude of secondary wavelets is ______.
पर्याय
equal in both the forward and the backward directions.
maximum in the forward direction and zero in the backward direction.
large in the forward direction and small in the backward direction.
small in the forward direction and large in the backward direction.
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उत्तर
According to Huygens’s principle, the amplitude of secondary wavelets is maximum in the forward direction and zero in the backward direction.
Explanation:
According to Huygens’s principle, every point on a wavefront acts as a source of secondary wavelets that spread out in all directions with the same speed as the original wave.
However, in practice:
- The amplitude of secondary wavelets is maximum in the forward direction (the direction of wave propagation).
- It is zero in the backward direction, meaning no wave travels backward.
This is because the backward wavelets interfere destructively, and the forward wavelets combine constructively to form the new wavefront.
संबंधित प्रश्न
Consider a plane wave front incident on a thin convex lens. Draw a proper diagram to show how the incident wave front traverses through the lens and after refraction focusses on the focal point of the lens, giving the shape of the emergent wave front.
Use Huygens' principle to verify the laws of refraction.
The refractive indices of water and diamond are `4/3` and 2.42 respectively. Find the speed of light in water and diamond. (c = 3x108 m/s)
Using Huygens’ principle, verify the laws of reflection at a plane surface.
Using this principle draw a diagram to show how a plane wave front incident at the interface of the two media gets refracted when it propagates from a rarer to a denser medium. Hence verify Snell's law of refraction.
Huygens' principle of secondary wavelets may be used to
(a) find the velocity of light in vacuum
(b) explain the particle behaviour of light
(c) find the new position of a wavefront
(d) explain Snell's Law
With what type of source of light are cylindrical wave fronts associated?
A plane wave front AB propagating from denser medium (1) into a rarer medium (2) is incident on the surface P1P2 separating the two media as shown in fig.
Using Huygen’s principle, draw the secondary wavelets and obtain the refracted wave front in the diagram.
The inverse square law of intensity is valid for a
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