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Physics Test 78...

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  • Question 1
    4 / -1

    When a ray of light enters a glass slab from air :-

  • Question 2
    4 / -1

    In a compound microscope, the intermediate image is :-

  • Question 3
    4 / -1

    A plano-convex lens has focal length ƒ = 20 cm. If its plane surface is silvered, then the new focal length will be :-

  • Question 4
    4 / -1

    The angle of prism is 30°. The rays incident at an angle of 60° at one refracting face suffer a deviation of 30°. Then the angle of emergence is :-

  • Question 5
    4 / -1

    To get three images of a single object, one should have two plane mirrors at an angle of :-

  • Question 6
    4 / -1

    An object of length 6 cm is placed on the principal axis of a concave mirror of focal length ƒ at a distance 4ƒ. The length of the image will be :-

  • Question 7
    4 / -1

    The angular dispersion for a lens is 0.0178 and deviation for yellow light is 0.5170, then dispersive power is :-

  • Question 8
    4 / -1

    A man suffering from short sight is unable to see objects distinctly at a distance greater than 2 m. The power of lens required to correct this defect should be :-

  • Question 9
    4 / -1

    Two lenses of power –15 D and + 5 D are in contact with each other. The focal length of the combination is :-

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