2/1 - EMS Practice - Fredric Harvey | Library

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Do electromagnetic waves need a medium to travel through?

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__________ has a greater/higher frequency.

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__________ has a greater/higher frequency.

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__________ has a greater/higher frequency.

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__________ has a greater/longer wavelengh.

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__________ has a greater/longer wavelengh.

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__________ has a greater/longer wavelengh.