An object 30 cm. tall is placed on principal axis of convex lens. Its 30 cm. Tall image is formed on screen placed at a distance of 15 cm. from the lens. Calculate focal length of lens.
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h1=30 cm
h2=30 cm
v=15 cm
m= (h2/h1=v/u)
SO,
30/30=15/u
u=15cm.
Now when object distance and image distance are the same then we can say that the object is placed at 2F..
2F = 15
F = 15/2.
h2=30 cm
v=15 cm
m= (h2/h1=v/u)
SO,
30/30=15/u
u=15cm.
Now when object distance and image distance are the same then we can say that the object is placed at 2F..
2F = 15
F = 15/2.
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0
Explanation:
lens its 10cm tall inverted image is formed on the screen ... a distance of 15cm from the lens calculate the focal length ...
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