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Q.

Which of the following are Electromagnetic waves?


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a

Radio waves

b

water waves

c

Sound waves

d

None of the above 

answer is A.

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Detailed Solution

Radio waves are Electromagnetic waves.
The only thing that constitutes electromagnetic waves are electric and magnetic fields moving at the speed of light through empty space. Since, from all the given options, radio waves travel without medium, i.e., it travels in the air.
On the other hand, water and sound waves are considered mechanical waves because water needs a medium for transportation. Without the transportation of the water, water waves won’t be produced, and particles present in the air are needed to transmit sound waves.
 
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