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Ray Optics Test...

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  • Question 1
    4 / -1

    The focal lengths of the objective and eye-lens of a microscope are 1 cm and 5 cm respectively. If the magnifying power for the relaxed eye is 45, then the length of the tube is

  • Question 2
    4 / -1

    The magnifying power of telescope is high if

  • Question 3
    4 / -1

    The focal length of the objective lens of a compound microscope is

  • Question 4
    4 / -1

    Microscope is an optical instrument which

  • Question 5
    4 / -1

    Magnifying power of a simple microscope is (when final image is formed at D = 25 cm from eye)

  • Question 6
    4 / -1

    If in compound microscope m1 and m2 be the linear magnification of the objective lens and eye lens respectively, then magnifying power of the compound microscope will be

  • Question 7
    4 / -1

    For which of the following colour, the magnifying power of a microscope will be maximum

  • Question 8
    4 / -1

    If the focal length of 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 infinity. The magnifying power of the microscope is

  • Question 9
    4 / -1

    An experiment is performed to find the refractive index of glass using a travelling microscope. In thisexperiment distances are measured by

  • Question 10
    4 / -1

    When the length of a microscope tube increases, its magnifying power

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