Draw a ray diagram when the object is kept at different position.
a) by convex lens when the object is kept at O and 2f1
b) by concave mirror when the object is kept at focus.
c) by concave mirror when the object is kept beyond centre of curvature
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When the object is placed between centre of curvature and principal focus of a concave mirror the image formed is beyond C as shown in the figure and it is real, inverted and magnified.
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draw a ray diagram when 0 is kept at C in convex lens
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