P-1 Lenses — Science STD 10 — Question

i.When an object is placed within the focal length of convex lens, one gets a magnified and erect image of the object.
ii. Magnification of about 20 times is obtained by a simple microscope.
iii. A watch repairer can see the minute parts of the watch more clearly and without eye strain with the help of simple microscope.
Hence, simple microscope is used for watch repairs.