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प्रश्न
What type of wavefronts are associated with a source infinity?
विकल्प
Cylindrical wavefronts
Plane wavefronts
Spherical wavefronts
All types of wavefronts
उत्तर
Plane wavefronts
Explanation:
A distant source is so far away that it is thought to be infinity. Rays traveling from a distant light source are assumed to be planes moving in the direction of wave propagation, and so the wavefront is a plane wavefront.
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संबंधित प्रश्न
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.
Using Huygens’ principle, verify the laws of reflection at a plane surface.
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.
Derive the law of reflection using Huygen’s Wave Theory.
Relation between ray and wavefront is ______.
The inverse square law of intensity is valid for a
For light diverging from a point source ______.
- the wavefront is spherical.
- the intensity decreases in proportion to the distance squared.
- the wavefront is parabolic.
- the intensity at the wavefront does not depend on the distance.
According to Huygens's principle, the amplitude of secondary wavelets is ______.
How is a wavefront different from a ray?
