Q. 28
Find the position, nature and size of the image of an object 3 cm high place at a distance of 9 cm from a concave mirror of focal length 18 cm.
Answer :
Given, height of object = + 3 cm
object distance(v) = 9 cm
focal length of concave mirror(f) = 18 cm
Using Mirror formula,For concave mirror, f = -18 cm, u = 9 cm
Using Magnification equation,
Thus, the image will be real, inverted and larger than the object.
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PREVIOUSDraw a ray diagram to show why a stick half immersed in water appears to be bent at the surface.NEXTYou have two lenses A and B of focal lengths + 10 cm and – 10 cm respectively. State the nature and power of each lens. Which of the two lenses will form a virtual and magnified image of an object placed 8 cm from the lens? Draw a ray diagram to justify your answer.
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