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When the light is reflected from the sur...

When the light is reflected from the surface of the mirror, its speed and wavelength will

A

increases

B

decreases

C

remains same

D

may increase or may decrease

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The correct Answer is:
D
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First Surface Mirror: Normally we use back surface mirrors. These are considered low precision mirrors because they actually have two reflecting surfaces. The first reflecting surface is the initial surface on the pane of glass where a small percentage of light is reflected off the surface. The second reflecting surface is the aluminium coating where a high percentage of light is reflected off the surface. This dual reflection effect of a low precision mirror causes a loss of contrast and image distortion that is undesirable in high precision applications like rear projection systems, scanners and reflecting telescopes. In these cases good image quality is highly preferred, and this is where a front surface mirror is desired for clarity and single image reflection. First surface mirrors are quite common in professional optics. However, compared with back surface mirrors, they have the important disadvantage of being substantially more sensitive. The front surface may be touched, and a metal coating on the front surface is substantially more sensitive than a bare glass surface. For example, fingerprints can easily cause oxidation of the metal. Also, moisture or aggressive gases may cause oxidation of the mirror coating. Light incident on back surface mirror suffers:

NIKITA PUBLICATION-WAVE THEORY OF LIGHT -Multiple Choice Questions
  1. The angle of incidence is equal to angle of reflection is the statemen...

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  2. Which of the following statement is true in case of reflection of ligh...

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  3. When the light is reflected from the surface of the mirror, its speed ...

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  4. The incident ray, the reflected ray and normal to the reflecting surfa...

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  5. The phase difference between incident ray and reflected ray of light i...

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  6. We can see object due to

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  7. The wavefronts of light coming from a distant source of unknown shape...

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  8. The nature of visible light waves is similar to

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  9. Maxwell's electromagnetic theory of light suggests that light consists...

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  10. A plane mirrorr is approaching you at a speed of 10cm//sec.You can see...

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  11. A man is 180 cm tall and his eyes are 10 cm below the top of his head....

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  12. A ray of light is incident on a plane mirror at an angle of incidence ...

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  13. A ray of light is incident normally on a plane mirrorr. The angle of r...

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  14. The nature of visible light waves is similar to

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  15. For a certain light, there are 2 xx 10^(3) waves in 1.5 mm in air. The...

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  16. Which of the following is an ascending order of frequency ?

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  17. The wavelength of light visible to eye is of the order of

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  18. Blue colour of water in sea is due to

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  19. Our eye is most sensitive for which of following wavelength

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  20. Signals of danger are made red, because

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