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प्रश्न
According to Huygens’s principle, the amplitude of secondary wavelets is ______.
विकल्प
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
Explain the construction of plane wavefront using Huygens’ principle.
What is the shape of the wavefront in the following case?
Light diverging from a point source.
State Huygen’s principle.
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 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.
When the width of the slit is made double the original width, how would this affect the size and intensity of the central diffraction band?
State Huygens’s principle. Show, with the help of a suitable diagram, how this principle is used to obtain the diffraction pattern by a single slit.
Draw a plot of intensity distribution and explain clearly why the secondary maxima becomes weaker with increasing order (n) of the secondary maxima.
Huygen's conception of secondary waves ______.
How is a wavefront different from a ray?
What type of wavefronts are associated with a point source of light?
