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Which among the following waves are examples of Electromagnetic waves?
1) X-rays 2) Gamma-rays 3) a-rays 4) ß-rays 5) Ultrasonic wave
Choose the appropriate code:

1, 2, 3 and 4 only
1 and 2 only
1 and 5 only
1, 2 and 5 only
Explanation:

• Electromagnetic waves or non-mechanical waves are those waves which do not require medium for their propagation i.e. which can propagate even through the vacuum are called non-mechanical wave.
• In other words, electromagnetic waves are waves which can travel through the vacuum of outer space. Mechanical waves, unlike electromagnetic waves, require the presence of a material medium in order to transport their energy from one location to another. • Following waves are not electro-magnetic – 1) Cathode rays 2) a-rays 3) ß-rays 4) Sound wave 5) Ultrasonic wave 6) Canal rays • Some important Electromagnetic waves – 1) ?-rays 2) X-rays 3) UV rays 4) Visible radiation 5) Infrared rays 6) Radio waves
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