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Generally, using the same objective lens...

Generally, using the same objective lens, but different eyepieces, different magnification can be obtained. True/false

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Construction of a compound microscope: (1) A compound microscope consists of a metal tube fitted with two convex lenses at the two ends. These lenses are called the objective lens (the lens directed towards the object0 and the eyepiece (the lens directed towards the eye) . Both the lenses are small in size , but the cross section of the objective lens is less than that of the eyepiece. The objective lens has a short focal length . The focal length of the eyepiece is more than that of the objective lens. (2) The metal tube is mounted on a stand . The principal axes of the objective lens and the eyepiece are along the same line.The distance between the object and the objective lens can be changed with a screw. use : This microscope is used to observe blood cells, microorganism , etc. State the use of a compound microscope

Construction of a compound microscope: (1) A compound microscope consists of a metal tube fitted with two convex lenses at the two ends. These lenses are called the objective lens (the lens directed towards the object0 and the eyepiece (the lens directed towards the eye) . Both the lenses are small in size , but the cross section of the objective lens is less than that of the eyepiece. The objective lens has a short focal length . The focal length of the eyepiece is more than that of the objective lens. (2) The metal tube is mounted on a stand . The principal axes of the objective lens and the eyepiece are along the same line.The distance between the object and the objective lens can be changed with a screw. use : This microscope is used to observe blood cells, microorganism , etc. In a compound microscope, which lens has greater focal length?

NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-True and False
  1. A convex lens is used as a simple microscope . True/False

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  2. A concave lens is used to correct myopia. True/False

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  3. A convex lens is used to correct hypermetropia. True/False

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  4. When red light falls on the eyes , the cells responbing to red light ...

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  5. When an object is placed in front of a concave lens , its image is obt...

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  6. The image formed by a concave lens is always virtual.

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  7. The principal focurs of a convex lens is virtual.

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  8. An object of height 2 cm forms an image of height 3 cm when placed in ...

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  9. Absence of rod like cells results in colour blindness. True/False

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  10. Nearsightedness can be corrected using spectacles having convex lenses...

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  11. Farsightedness can be corrected using spectacles having lenses of suit...

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  12. As one grows old, ciliary muscles become weak. True/false

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  13. In a simple microscope, the object is placed within the focal length o...

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  14. A compound microscope forms an erect and real image of a small object.

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  15. In a compound microscope, a real image acts as an object for the eye...

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  16. In television, we see a continuous picture due to persistence of visio...

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  17. The conical cells can respond differently to red, green and blue colou...

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  18. The rod like cells respond to colours, and communicate the presence of...

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  19. The conical cells respond to the intensity of light and communicate th...

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  20. Generally, using the same objective lens, but different eyepieces, dif...

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