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Ray Optics Test...

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  • Question 1
    4 / -1

    An equiconvex lens of glass of focal length 0.1 metre is cut along a plane perpendicular to principle axis into two equal parts. The ratio of focal length of new lenses formed is

  • Question 2
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    The distance between an object and the screen is 100 cm. A lens produces an image on the screen when placed at either of the positions 40 cm apart. The power of the lens is

  • Question 3
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    A achromatic combination is made with a lens of focal length f and dispersive power ω with a lens having dispersive power of 2ω. The focal length of second will be

  • Question 4
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    A convex lens

  • Question 5
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    The focal length of a convex lens depends upon

  • Question 6
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    When a glass lens with n = 1.47 is immersed in a trough of liquid, it looks to be disappeared. The liquid in the trough could be

  • Question 7
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    fvand fr are the focal lengths of a convex lens for violet and red light respectively and Fv and Fr are the focal lengths of a concave lens for violet and red light respectively, then

  • Question 8
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    If a lens is cut into two pieces perpendicular to the principal axis and only one part is used, the intensity of the image

  • Question 9
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    A convex lens of focal length f produces an image 1/n times than that of the size of the object. The distance of the object from the lens is

  • Question 10
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    A substance is behaving as convex lens in air and concave in water, then its refractive index is

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