Read para and answer the questions.Ligth is an agent that creates stimulation.Light usually refers to visible light, which is electromagnetic radiation that is visible to the human eye and is responsible for the sense of sight.
(i)An object 5 cm high is placed at a distance of 10 cm from a convex mirror of radius of curvature 30 cm Find nature position and size of image
(ii)An object 20 cm from a spherical mirror give raise to virtual image 15 cm behind mirror determine magnification of image of type of mirror used.
(iii)An object is placed at a distance of 12 cm from convex mirror of radius of curvature 12 cm.Find the position of image
please answer all questions with detailed explanations

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2014-12-08T18:10:58+05:30

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1)      f= +30/2= +15cm

u=-10 cm

1/v = 1/f-1/u= 1/15+1/10=1/6

v = 6 cm behind the mirror.   It is erect and smaller than object.

h’/h=-v/u=6/10     h’ = 3 cm

 

    2)

         u = -20cm  v=15cm       1/f = 1/15 -1/20 = 1/60        

         f = 60 cm  => convex mirror.   m= -15/-20 = 0.75

 

 3)

         f=12/2=6cm        u=-12cm    

             v = uf/(u-f)=-72/-(12+6)= 4 cm    m= 4/12
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