plzzzz give me an answer quickly !!!!
A bag contains lenses with focal lengths 10cm, 20cm and 25cm which are not marked with there focal lengths. Describe a simple activity to identify the three types of lenses?
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plzzzz give me an answer quickly !!!!
A bag contains lenses with focal lengths 10cm, 20cm and 25cm which are not marked with there focal lengths. Describe a simple activity to identify the three types of lenses?
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