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Figure 9.35 shows a cross-section of a ...

Figure 9.35 shows a cross-section of a glass fibre of refractive index 1.68. The outer covering of the pipe is made of a material of refractive index 1.44. What is the range of the angles of the incident rays with the axis of the pipe for which total reflections inside the pipe take place, as shown in the figure. What is the answer if there is no outer covering of the pipe? :

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PSEB-RAY OPTICS AND OPTICAL INSTRUMENTS-EXERCISE
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  2. Figure 9.35 shows a cross-section of a glass fibre of refractive index...

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  3. Figure 9.35 shows a cross-section of a glass fibre of refractive inde...

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  4. Answer the following questions: You have learnt that plane and convex ...

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  5. Answer the following questions: A virtual image, we always say, canno...

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  6. Answer the following questions: A diver under water, looks obliquely ...

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  7. Answer the following questions: Does the apparent depth of a tank of ...

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  8. Answer the following questions: The refractive index of diamond is mu...

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  9. The image of a small electric bulb fixed on the wall of a room is to b...

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  10. A screen is placed 90cm from an object. The image of the object on the...

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  11. Determine the ‘effective focal length’ of the combination of the two l...

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  12. Two lenses convex lens of focal length 30 cm in contact with a concave...

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  13. At what angle should a ray of light be incident on the face of a prism...

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  14. You are given prisms made of crown glass and flint glass with a wide v...

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  15. You are given prisms made of crown glass and flint glass with a wide v...

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  16. For a normal eye, the far point is at infinity and the near point of d...

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  17. Does short-sightedness (myopia) or long-sightedness (hyper metropia) i...

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  18. A myopic person has been using spectacles of power -1.0D for distant v...

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  19. A person looking at a person wearing a shirt with a pattern comprising...

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  20. A man with normal near point (25 cm) reads a book with small print usi...

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