Self Studies
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Ray Optics Test...

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  • Question 1
    4 / -1

    A luminous object is separated from a screen by distance d. A convex lens is placed between the object and the screen such that it forms a distinct image on the screen. The maximum possible focal length of this convex lens is

  • Question 2
    4 / -1

    Figure shows an object AB placed in front of two thin coaxial lenses 1 and 2 with focal lengths 24 cm and 9.0 cm, respectively. The object is 6.0 cm, from the lens I and the lens separation is L=10 cm. Where does the system of two lenses produce an image of the object AB ?

  • Question 3
    4 / -1

    A convex lens has its radii of curvature equal. The focal length of the lens is f. If it is divided vertically into two identical plano-convex lenses by cutting it, then the focal length of the plano-convex lens is (μ = the refractive index of the material of the lens)

  • Question 4
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    A thin converging lens of focal length f = 25 cm forms the image of an object on a screen placed at a distance of 75 cm from the lens. The screen is moved closer to the lens by a distance of 25 cm. The distance through which the object has to be shifted, so that its image on the screen in sharp again is

  • Question 5
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    A double convex lens of glass of refraction index µ is immersed in a medium of refractive index µ1 . If a parallel beam emerges undeviated through the lens, then

  • Question 6
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    Light form a point source in air falls on a spherical glass surface (n = 1.67 and radius of curvature = 25 cm). The distance of the light source from the glass surface is 95 cm. At what position, the image is formed?

  • Question 7
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    The image of an object, formed by a plano-convex lens at a distance of 8 m behind the lens, is real and in one-third the size of the object. The wavelength of light inside the lens is 2/3 times the wavelength in free space. The radius of the curved surface of the lens is

  • Question 8
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    Diameter of a plano-convex lens is 6 cm and thickness at the centre is 3 cm. If speed of light in material of lens is 2 × 108 m/s, the focal length of the lens is

  • Question 9
    4 / -1

    The graph between angle of deviation (δ) and angle of incidence (i) for a triangular prism is represented by

  • Question 10
    4 / -1

    The plane faces of two identical plano-convex lenses each having a focal length of 50 cm are placed against each ether to form a usual biconvex lens. The distance from this lens combination at which an object must be placed to obtain a real, inverted image which has the same size as the object is

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