Page 49 - WAVES
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Electro- Magnetic Waves
It is produced when electric and magnetic field vibrate at right angle to each other. The direction
of propagation of the wave is perpendicular to both fields .
Electric field, E
Electric field
Direction of
propagation
Magnetic field
Magnetic field, B
Properties Of Electro-magnetic Waves
• They transfer energy from one point to another.
• They are transverse waves.
• They can travel through vacuum.
• They travel at the same speed through vacuum (speed of light , c = 3 x 10 ms )
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• They all show wave properties such as reflection, refraction, diffraction and interference.
• They obey the wave equation, v = fλ.
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