a student has to project the three times magnified image of a candle flame on a wall name the type of the lens required for the purpose it the candle flame is a distance of 6 m from the wall find the focal length of the lens
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concave lens is used
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Convex lens as concave lens forms diminished images while it forms both diminished and magnified images.
The candle will be kept at focus of the lens to obtain real, inverted and magnified image of object.
Let the distance of candle from lens be x (focal length).
Image distance from lens is 6-x.
Maginfication = 3 = Image distance / Object Distance = 6-x / x
3x = 6-x
x(focal length) = 6/4 = 1.5
Hope it helps
:]
The candle will be kept at focus of the lens to obtain real, inverted and magnified image of object.
Let the distance of candle from lens be x (focal length).
Image distance from lens is 6-x.
Maginfication = 3 = Image distance / Object Distance = 6-x / x
3x = 6-x
x(focal length) = 6/4 = 1.5
Hope it helps
:]
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