The total magnification produced by a compound microscope is 20.The magnification produced by the eyepiece is 5.The microscope is focussed on a certain object.The distance between the objective and eyepiece is observed to be 14cm.If the least distance of distinct vision is 20cm calculate the focal length of the objective and the eyepiece.
Overall magnification
= 20
here it is assumed the image of objective lens is formed ner to focal point of eyepiece