(a) ultra-violet radiation [1], radio waves [1]
(b) number of complete waves produced per second [1]
(c) speed of wave = 3.0 × 10^8 m/s [1]
(d) transverse wave OR can travel through a vacuum [1]
N06/2/5a
different frequencies or wavelengths [1]
N08/2/2
(a) infra-red radiation [1](b) microwaves [1]
(c) gamma rays [1]
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