Question

Q... we wish to obtain an equal sized inverted image of a candle flame on a screen kept at a distance of 4m from the candle flame;
a) Name the type of lens that should be used.
b) What should be the focal length of the lens and at what distance from the candle flame should the lens be placed?
c) Draw a ray diagram to show the Image formation in this case. ​

Answer 1

Answer:

a) convex lens

b)the focal length is 2m. the lens is placed at the distance of 4m from the candle