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An air bubble inside water. The refracti...

An air bubble inside water. The refractive index of water is 4/3 . At what distance from the air bubble should a point object be placed so as to form a real image at the same distance from the bubble:-

A

(a)2R

B

(b)3R

C

(c)4R

D

(d)The air bubble cannot form a real image

Text Solution

Verified by Experts

The correct Answer is:
D
`n_(1) gt n_(2)` But at here `igtr` not possible
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ALLEN -GEOMETRICAL OPTICS-EXERCISE- 01
  1. A ray of light is incident upon an air/water interface ( it passes fro...

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  2. A light ray is incident on a transparent sphere of index = sqrt(2) , a...

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  3. An air bubble inside water. The refractive index of water is 4/3 . At ...

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  4. A paraxial beam is incident on a glass (n=1.5) hemisphere of radius R=...

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  5. A concave spherical surface of radius of curvature 10 cm separates two...

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  6. A double convex lens, lens made of a material of refractive index mu(1...

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  7. Optic axis of a thin equiconvex lens is the x-axis. The co-rodinates o...

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  8. A converging lens of focal length 20 cm and diameter 5 cm is cut along...

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  9. Look at the ray diagram shown ,what will be th focal length of th e1^(...

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  10. A diverging lens of focal length 10cm is placed 10cm in front of a pla...

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  11. A point object O moves from the principal axis of a converging lens in...

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  12. A point object O is placed at a distance of 20 cm from a convex lens o...

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  13. A point source of light is placed on the principal axis between F and ...

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  14. A man washign to get a picture of a Zebra photographed a white donkey ...

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  15. A lens if placed between a source of light and a wall. It forms images...

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  16. In the displacement method , a convex lens is placed in between an obj...

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  17. A beam of light consisting of red, green and blue colours is incident ...

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  18. A ray of light is incident normally on the first refracting face of th...

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  19. A horizontal ray of light passes through a prism of index 1.50 and ape...

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  20. The curve of angle of incidence versus angle of deviaton wshown has be...

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