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Which of the following generates a plane...

Which of the following generates a plane wavefront?

A

`alpha-"rays"`

B

`beta-"rays"`

C

`gamma-"rays"`

D

None of these

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Verified by Experts

The correct Answer is:
D
When the point source or linear source of light is at very large distance, a small portion of spherical or cylindrical wavefront appears to be plane, such a wavefront is called a plane wavefront.

In the given options, none of sources generates plane wavefront, it can be artificially produced by reflection from a mirror or by refraction through a lens.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE THEORY OF LIGHT -EXERCISE 1
  1. According to corpuscular theory of light, the different colours of lig...

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  2. For a ray of light, which of the following statements holds true?

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  3. Which of the following generates a plane wavefront?

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  4. When a ray of light is incident normally on a surface, then

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  5. A wavefront is……….of all the particales of a medium which are…………….. .

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  6. Which of the following statement (s) is/are correct? I. A point sour...

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  7. The idea of secondary wavelets for the propagation of a wave was first...

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  8. A shortcoming of Huygen's model could not

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  9. Ray diverging from a point source from a wave front that is

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  10. Wavefront is the locus of all points, where the particles of the mediu...

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  11. Light waves travel in vacuum along the y-axis. Which of the following ...

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  12. A light wave travels through a medium carrying energy in three dimensi...

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  13. According to Huygens' principle, a wavefront propagates through a medi...

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  14. In given figure, light passes from denser medium 1 to rarer medium 2. ...

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  15. Figure shows behaviour of a wavefront when it passes through a prism. ...

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  16. If a source of light is moving away from a stationary observer, then t...

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  17. If a star is moving towards the earth, then the lines are shifted towa...

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  18. It is believed that the universe is expanding and hence the distant st...

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  19. In case of reflection of a wavefront from a reflecting surface, I...

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  20. If AB is incident wavefront, then refracted wavefront is

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