C5 1
Lenses a) Eddy uses a converging lens as a magnifying glass to view fine print on an instruction manual. Sketch a diagram to show the image formed. Label the principal axis and the focal point of the converging lens.
[4]
b) State whether the image is virtual or real. [1] 2
An object of height 2·5 cm is placed 12 cm in front of a converging lens. An image is produced 4 cm behind the lens. Using the lens formula, calculate: a) the focal length of the lens.
[3]
b) the magnification of the lens.
[3]
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CSEC Physics Workbook.indd 63
02/06/16 4:58 PM