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Two plane mirrors A and B are aligned pa...

Two plane mirrors A and B are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle 30degree at a point just inside one end of A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is

A

28

B

30

C

32

D

34

Text Solution

Verified by Experts

The correct Answer is:
B
`tan30=1/sqrt(3)=x/0.2impliesx=0.2/sqrt(3)`
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NARAYNA-RAY OPTICS AND OPTICAL INSTRAUMENTS -EXERCISE-2 (C.W)(REFLECTION)
  1. Two plane mirrors are arranged at right angles to each other as shown ...

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  2. An object moves with 5ms^(-1) toward right while the mirror moves wit...

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  3. Two mirror labelled L(1) for left mirror and L(2) for right mirror (L(...

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  4. A ray of light is incident at 50^(@) on the middle of one of the two m...

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  5. Two plane mirrors A and B are aligned parallel to each other, as shown...

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  6. With a concave mirror, an object is placed at a distance x(1) from the...

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  7. A short linear object of length b lies along the axis of a concave mir...

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  8. A rod of length 10 cm lies along the principal axis of a concave mirro...

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  9. A car is fitted with a convex side-view mirror of focal length 20 cm. ...

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  10. The velocity of image w.r.t ground in the below figure is

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  11. A square wire of side 3.0 cm is placed 25 cm away from a concave mirro...

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  12. An object is moving towards a concave mirror of focal length 24 cm. Wh...

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  13. The distance between an object and its doubly magnified image by a con...

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  14. In the figureshownm the image of a real object is formed at point I. A...

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  15. A ray of light is incident on a plane mirror along a vector hat i+hat ...

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  16. A plot of modulus of image distance versus object distance for a spher...

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  17. A small plane mirror kept at the centre of a sphere of diameter 3 m, m...

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  18. A man ‘A’ stands at the position shown in the figure and a second man ...

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