A wavelength of red light is measured as

PHYSICS · Subjective · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

A wavelength of red light is measured as (4.7±0.3)×10−7 m(4.7\pm0.3)\times10^{-7}\,\text{m}. State the single order of magnitude that should be reported for this wavelength and justify your choice briefly.

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