Question
State Newlands’ law of octaves.
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| Column A | Column B |
| (1) Persistence of vision | (a) Lenses and mirrors are used |
| (2) Reflecting telescope | (b) To see objects far away from us |
| (3) Telescope | (c) Motion picture |
| (4) Compound microscope | (d) To observe blood |
| (e) Convex lens |
