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Which of the following statements is true? A.)An electromagnetic waves can travel in vacuum B.) Sound...

Which of the following statements is true?
A.)An electromagnetic waves can travel in vacuum
B.) Sound waves do not need a medium to propagate
C.) Visible light travels only in air
D.) The speed of an electromagnetic wave does not depend on the medium
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Answer #1

Option (A)

An electromagnetic wave can travel in vacuum for example light is an electromagnetic wave and light can travel in vacuum with speed of 3×108 m/s

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