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Ray Optics Test...

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  • Question 1
    4 / -1

    An electron microscope is superior to an optical microscope in

  • Question 2
    4 / -1

    The magnifying power of a microscope with an objective of 5 mm focal length is 400. The length of its tube is 20 cm. Then the focal length of the eye-piece is

  • Question 3
    4 / -1

    When the object is self-luminous, the resolving power of a microscope is given by the expression

  • Question 4
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    The power of two convex lenses A and B are 8 dioptres and 4 dioptres respectively. If they are to be used as a simple microscope, the magnification of

  • Question 5
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    A person using a lens as a simple microscope sees an

  • Question 6
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    Resolving power of a microscope depends upon

  • Question 7
    4 / -1

    In a compound microscope, the focal lengths of two lenses are 1.5 cm and 6.25 cm. An object is placed at 2 cm form objective and the final image is formed at 25 cm from eye lens. The distance between the two lenses is

  • Question 8
    4 / -1

    A wire mesh consisting of very small squares is viewed at a distance of 8 cm through a magnifying converging lens of focal length 10 cm, kept close to the eye. The magnification produced by the lens is

  • Question 9
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    The magnifying power of a simple microscope is 6. The focal length of its lens in metres will be, if least distance of distinct vision is 25 cm

  • Question 10
    4 / -1

    A compound microscope has two lenses. The magnifying power of one is 5 and the combined magnifying power is 100. The magnifying power of the other lens is

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