1.

The range of visible wave length on electromagnetic spectrum is

A. 0.4 to 0.7 micrometres
B. 0.7 to 15.0 micrometres
C. 0.3 to 0.9 micrometres
D. 0.3 to 15.0 micrometres
Answer» B. 0.7 to 15.0 micrometres


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