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Light Reflection and Refraction Test - 24

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Light Reflection and Refraction Test - 24
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  • Question 1
    1 / -0

    A full length image of a distant tall building can definitely be seen by using

    Solution

    Field of view of a convex mirror is more than any other type of mirror. Hence, a full length image of a distant tall building can definitely be seen by using this.

  • Question 2
    1 / -0

    In torches, search lights and headlights of vehicles the bulb is placed

    Solution

    Reflectors of headlights and searchlights are in the shape of concave mirror. When source of light is placed at the focus, the reflected light appears like a beam of light.

  • Question 3
    1 / -0

    The laws of reflection hold good for

    Solution

    All mirrors irrespective of their shape

  • Question 4
    1 / -0

    You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?

    Solution

    Refractive index for water, mustard oil, glycerine and kerosene are:
    \(?_w=1.33\\ ?_m=1.47\\ ?_g=1.473\\ ?_k=1.44\)
    Since refractive index of glycerine is highest, ray bends the most in case of glycerine.
     

  • Question 5
    1 / -0

    A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.

    Solution

    When object is between F and P of concave mirror, an enlarged and erect image is formed behind the mirror. So, the child is seeing her head in a concave mirror. Plane mirror makes similar sized image as object. So, the middle portion of her body appears to be of same size in mirror. A convex mirror makes smaller image and hence legs are appearing smaller in mirror.

  • Question 6
    1 / -0

    In which of the following, the image of an object placed at infinity will be highly diminished and point sized?

    Solution

    In case of all of the above, when an object is at infinity, image is highly diminished and point sized.

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