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Secondary - Physical Science
The energy generated by the sun travels to Earth as electromagnetic waves of varying lengths. Which statement correctly describes an electromagnetic wave with a long wavelength?
It has a high frequency and low energy.
It has a low frequency and can travel through a vacuum.
It has a low frequency and needs a medium to travel through.
It has a high frequency and high energy.
Answer:
It has a low frequency and can travel through a vacuum.
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