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When a ray of light is incident normally...

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

A

total internal reflection takes place

B

it passes undeviated

C

it undergoes dispersion

D

it gets absorbed by the surface

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Verified by Experts

The correct Answer is:
B
From Huygens' principle, if the incident wavefront be parallel to the interface of the two media (I = 0), then the refracted wavefront will also be parallel to the interface (r = 0). In other words, if light rays fall normally on the interface, then on passing to the second medium, they will not deviate from their original path.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE THEORY OF LIGHT -EXERCISE 1
  1. For a ray of light, which of the following statements holds true?

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  2. Which of the following generates a plane wavefront?

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

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

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

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

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  7. A shortcoming of Huygen's model could not

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

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

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

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

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

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

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

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

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

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

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

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

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  20. In the context of Doppler effect in light, the term red shift signifie...

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