1
Which statement about electromagnetic waves is correct?
A
All electromagnetic waves have speeds in air of approximately 3 x 100m/s.
in air, some electromagnetic waves travel faster than light
B
С
The electromagnetic waves with the largest wavelength are in the infra-red region
D
The electromagnetic waves with the smallest wavelength are in the X-ray region.
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what is the B point and I think your answer is A or C
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