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If the focal length of the objective and...

If the focal length of the objective and eye lens are 1.2 cm and 3 cm respectively and the object is put 1.25 cm away from the objective lens and the final image is formed at the infinity. The magnifying power of the microscope is

A

`150`

B

`200`

C

`250`

D

`400`

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The correct Answer is:
B
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RESONANCE ENGLISH-GEOMATRICAL OPTICS -Exercise-1
  1. A person with a defective sight is using a lens having a power of +2D....

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  2. The focal lengths of the objective and eye lens of a microscope are 1 ...

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  3. If the focal length of the objective and eye lens are 1.2 cm and 3 cm...

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  4. Find the angle fo deviation (both clockwise and anti-clock wise)suf...

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  5. Figures shows a plane mirror on which a light ray is incident, if t...

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  6. A light ray is incident on a plane mirror, which after getting refl...

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  7. Sun rays are incident at an angle of 24^(@) with the horizon. How ca...

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  8. Two plane mirrros are placed as shown in the figure and a point objec...

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  9. A point object is placed (0,0) and a plane mirror 'M' is placed, incl...

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  10. A rod of length 10 cm lies along the principal axis of a concave mirr...

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  11. A point source is at a distance 35cm on the optical axos from a sph...

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  12. Find the diameter of the image of the moon formed by a spherical conc...

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  13. The radius of curvature of a convex spherical mirror is 1.2m. How fa...

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  14. A converging beam of light rays in incident on a concave spherical ...

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  15. A point object is placed on the principle axis at 60cm in fornt ...

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  16. A man uses a concave mirror for shaving. He keeps his face at a dist...

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  17. Two spherical mirros (convex and concave) having the same focal leng...

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  18. A light ray falling at an angle of 45^@ with the surface of a clean sl...

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  19. A light ray is incident at 45^(@) on a glass slab. The slab is 3cm thi...

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  20. In the given figure an abserve in air (n=1) sees the botoom of a bre...

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