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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.
उत्तर
According to Huygens's principle, the amplitude of secondary wavelets is equal in both the forward and the backward directions.
Explanation:
- The Huygen principle states that every point on a wavefront serves as a source for secondary wavelets, whose amplitudes are proportional to those of the original wavefront. The secondary wavelets' amplitude, however, remains constant in all directions.
- Option (maximum in the forward direction and zero in the backward direction.) is not correct as the amplitude of the secondary wavelets is not zero in the backward direction.
- The amplitude of the secondary wavelets relies on the geometry and shape of the wavefront and may not be the same in all directions, therefore, options (large in the forward direction and small in the backward direction.) and (small in the forward direction and large in the backward direction.) are not necessarily true.
- So none of them is the exact answer for this, but the option (equal in both the forward and the backward directions.) could be correct either time.
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.
You have learnt in the text how Huygens’ principle leads to the laws of reflection and refraction. Use the same principle to deduce directly that a point object placed in front of a plane mirror produces a virtual image whose distance from the mirror is equal to the object distance from the mirror.
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)
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.
With what type of source of light are cylindrical wave fronts associated?
Define a wavefront. Using 'Huygens' principle, draw the shape of a refracted wavefront, when a plane wave is incident on a convex lens.
According to Huygen's construction, relation between old and new wavefront is ______.
What is the geometrical shape of the wavefront for:
- Light diverging from a point source?
- The pattern of wavefront of the light from a distant star intercepted by earth?
