Tessellate S.T.E.M.S. (2019) - Physics - School - Set 1 - Objective Problem 3
Level
1
What is the power of a lens of focal length equal to that of a combination of lenses of focal lengths 20cm and 70cm.
7.4 Dioptres
6.4 Dioptres
5.6 Dioptres
3.3 Dioptres
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