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Ray Optics Test...

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  • Question 1
    4 / -1

    Under which of the following conditions will a convex mirror of focal length f produce an image that is erect, diminished and virtual

  • Question 2
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    An object 2.5 cm high is placed at a distance of 10 cm from a concave mirror of radius of curvature 30 cm. The size of the image is

  • Question 3
    4 / -1

    An object moving at a speed of 5 m/s towards a concave mirror of focal length f = 1m is at a distance of 9 m. The average speed of the image is

  • Question 4
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    For unit magnification, the distance of an object from a concave mirror of focal length 20 cm will be

  • Question 5
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    To an observer on the earth the stars appear to twinkle. This can be ascribed to

  • Question 6
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    The ratio of the refractive index of red light to blue light in air is

  • Question 7
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    The refractive index of a piece of transparent quartz is the greatest for

  • Question 8
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    The refractive index of a certain glass is 1.5 for light whose wavelength in vacuum is 6000 A. The wavelength of this light when it passes through glass is

  • Question 9
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    When light travels from one medium to the other of which the refractive index is different, then which of the following will change

  • Question 10
    4 / -1

    When light wave suffer reflection at the interface between air and glass, the change of phase of reflected wave is equal to

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