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A glass prism of refractive index 1.5 is...

A glass prism of refractive index 1.5 is immersed in water `(mu= 4//3)`. A light beam normally on the face AB is totally reflected to reach on the face BC if
.

A

`sin theta ge 8//9`

B

`2//3 lt sin theta lt 8//9`

C

`sin theta le 2//3`

D

none of the above

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. The critical angle of light passing from glass to air is minimum for

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  2. Which of the following phenomenon is used in optical fiber?

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  3. A glass prism of refractive index 1.5 is immersed in water (mu= 4//3)....

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  4. A,B and C in the diagram represent rays of light incident upon a face ...

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  5. Refractive index of water is 5//3. A light source is placed in water a...

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  6. A fish looking up through the water sees the outside world contained i...

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  7. A diver in swimming pool wants to signal his distress to a person lyin...

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  8. An equiconvex lens has focal length equal to the radius of curvautre.I...

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  9. What is the focal length of a double convex lens for which radius of c...

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  10. A lens behaves as a converging lens in air and diverging lens in wate...

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  11. The two surfaces of a convex lens are of same radius of curvature.It i...

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  12. The two surfaces of a convex lens are of same radius of curvature.It i...

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  13. A convex lens is placed in contact with a mirror as shown in figure. I...

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  14. For a given distance between an object and an image screen,magnificati...

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  15. An object is placed at a distance of f//2 from a convex lens .The imag...

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  16. A camera is focussed to take a cose up picture of an insect at a dista...

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  17. The graph drawn with object distance along abbscissa and image distanc...

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  18. Two plane -convex lenses,each having focal length of 0.4 m,are pressed...

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  19. A film projector magnifies a 100 cm^2 film strip on a screen.If the li...

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  20. In order to include the effect of thickness t of the lens,following f...

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