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A container is filled with water (mu= 1....

A container is filled with water `(mu= 1.33)` upto a height of 33.25 cm .a concave miror is placed 15 cm above the water level and the image of an object placed at the bottom is formed 25 cm below the water leverl[Fig.2.90].Find the focal length of the concave mirror.

A

10 cm

B

15 cm

C

20 cm

D

25 cm

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. A concave mirror s placed on a horizontal table with its axis directed...

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

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

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  4. A ray of light passes through four transparent media with refractive i...

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  5. A light beam is travelling from Region I to IV (figure). The refractiv...

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  6. A ray of light is incident at the glass-water interface at an angle i....

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  7. A ray of light travelling in a transparent medium of refractie index m...

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  8. A beam of light is converging towards a point on a screen.A plane para...

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  9. A diverging beam of light from a point source S having divergence angl...

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

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  11. A rectangular glass slab ABCD of refractive index n1 is immersed in wa...

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  12. An observer can see through a pin-hole the top end of a thin rod of he...

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  13. Two beams of red and violet colours re mde to pass separaterly through...

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  14. A ray OP of monochromatic light is incident on the face AB of prism AB...

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  15. Which of the following forms (s) a virtual and erect image fo all posi...

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  16. A spherical surface radius of curvatue R seprates air (refractive inde...

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  17. A point object is placed at the centre of a glass sphere of radius 6 c...

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  18. The graph between object distance u and image distance v for a lens is...

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  19. A convex lens A of focal length 20 cm and a concave lens B of focal le...

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  20. The size of the image of an object,which is at infinity, as formed by ...

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