Q. 224.5( 11 Votes )

Analyse the follo

Answer :

a. From observation 3 image distance = object distance so radius of curvature = 40 cm

so focal length is half of the radius of curvature = 20 cm

b. Observation 6 is not correct as the object is placed between optical center and focus so the image will be erect and virtual, so image distance will not be positive.


u = -60 cm; v = + 30 cm f = - 20 cm

m = v/u = 30/-60

m = -0.5

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