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Light Test - 8

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Light Test - 8
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The image of our face in a plane mirror is
    Solution
    the image formed by a plane mirror is a virtual , laterally inverted image at same distance from the mirror that of object and of same size of object.
  • Question 2
    1 / -0
    The phenomenon that leads to the bouncing back of light rays is called-
    Solution
    $$ \bf{Diffraction} $$ is the phenomenon of bending of light waves around the corners of an obstacle or aperture, placed in the path of light beam. 

    $$ \bf{Reflection} $$ is the phenomenon in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium. 

    $$\bf{Dispersion} $$ is the phenomenon of splitting of white light into its component colours (VIBGYOR) on passing through a glass prism.

    $$ \bf{Refraction} $$ of light is the phenomenon of bending of light or change in the direction of light, when it passes obliquely from one transparent medium to another.

    Hence, the correct answer is OPTION B. 
  • Question 3
    1 / -0
    The light reflected by a plane mirror may form a real image .......... .
    Solution
    The light reflected by a plane mirror may form a real image if the rays incident on the mirror are converging.

  • Question 4
    1 / -0
    A virtual image formed by a plane mirror is -
    Solution
    A plane mirror always forms erect image and of same size as well.
  • Question 5
    1 / -0
    If we want to see our full image, then the minimum size of the plane mirror :
    Solution
    If we want to see our full image then the minimum size of the plane mirror should be half of our height.

  • Question 6
    1 / -0
    Which mirror is used in movie projectors?
    Solution
    Answer is B.

    Concave mirrors project a beam of light outward, which is what we want in a reflector or projector. 
    They used in things like TV or movie projectors to make light rays spread out  and produce enlarged images.
  • Question 7
    1 / -0
    The image of a real object in a plane mirror is always:
    Solution
    It should be remembered that plane mirror always forms virtual, erect and laterally inverted image. The image distance and object distance are equal from the plane mirror. The shape and size of the image is same as the object.

    So option D is correct.
  • Question 8
    1 / -0
    The phenomenon in which light that strikes a surface is thrown back into the same medium is called -
    Solution
    $$ \bf{Reflection} $$ is the phenomenon in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium. 

    A $$\bf{Reflex\ action} $$ is an involuntary and nearly instantaneous movement in response to a stimulus.
     
    $$ \bf{Refraction} $$ of light is the phenomenon of bending of light or change in the direction of light, when it passes obliquely from one transparent medium to another.

    $$ \bf{Regression} $$ is a technique for determining the statistical relationship between two or more variables where a change in a dependent variable depends on the change in one or more independent variables.

    Hence, the correct answer is OPTION A. 
  • Question 9
    1 / -0
    A man stands in front of a plane mirror at a distance of 2 metres. The distance of his image from him will be -
    Solution
    Image formed by plane mirror is at equal distance from the mirror as of object the mirror .
    Hence distance between object and image is 4m.

  • Question 10
    1 / -0
    The image formed by a plane mirror is -
    Solution
    A plane mirror always forms an image which is virtual in nature (meaning that light rays meet behind the mirror or that light rays do not actually come from the image), erect and of the same shape and size as that of the object it is reflecting.
    Hence, the correct answer is OPTION A. 
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