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A point object is placed at the centre o...

A point object is placed at the centre of a glass sphere of radius 6cm and refractive index 1.5. The distance of virtual image from the surface is

A

(a)2 cm

B

(b) 4 cm

C

(c) 6 cm

D

(d)12 cm

Text Solution

Verified by Experts

The correct Answer is:
C
When the object is placed at the centre fo the glass sphere, the rays from the sphere and emerge undeviated .
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ALLEN -GEOMETRICAL OPTICS-EXERCISE-05 (B)
  1. White light is incident on the interface of glass and air as shown in ...

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  2. An equilateral prism is placed on a horizontal surface. A ray PQ is in...

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  3. A point object is placed at the centre of a glass sphere of radius 6cm...

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  4. A container is filled with water (mu=1.33) upto a height of 33.25 cm. ...

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  5. A convex lens if in contact with concave lens. The magnitude of the ra...

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  6. A point object is placed at distance of 20 cm from a thin plane - con...

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  7. A biconvex lens of focal length f forms a circular image of radius r o...

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  8. A ray of light travelling in water is incident on its surface open to ...

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  9. In an experiment to determine the focal length (f) of a concave mirror...

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  10. Two beams of red and violet colours are made to pass separately throug...

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  11. A light beam is traveling from Region I to region IV (refer figure). T...

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  12. A ball is dropped from a height of 20 m above the surface of water in ...

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  13. A biconvex lens of focal length 15 cm is in front of a plane mirror. T...

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  14. A ray of light travelling in the direction (1)/(2)(hati+sqrt3hatj) is ...

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  15. The image of an object, formed by a plano-convex lens at a distance of...

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  16. A right angled prism of refractive index mu(1) is placed in a rectangu...

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  17. A point source S is placed at the bottom of a transparent block of hei...

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  18. Four combinations of two thin lenses are given in List I. The radius o...

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  19. Two identical glass rods S(1) and S(2) (refractive index=1.5) have one...

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  20. A parallel beam of light is incident from air at an angle alpha on the...

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