## Thursday, March 17, 2011

### ~ Physics ~

QWERTYUIOP....

·        Radio waves have the longest wavelength but are low frequency of waves. They carry very little energy.
·         While, gamma rays have the shortest wavelength but are high frequency of waves. So that, they carry very high energy.
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·         It is produced when electric field and magnetic field vibrate at perpendicular to each other.
·         The direction of propagation of the waves is perpendicular to both fields.
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·         Red has the longest wavelength and violet is the shortest.

·         When all the waves are seen together, they make white light.

·         The white light is broken apart into the seven colour of the visible light spectrum.

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·         They transfer light from one point to another.

·         They are transverse waves.

·         They can travel through vacuum.

·         All types of electromagnetic waves travel at the speed of light and at the same speed in vacuum, i.e (that is) the speed of light , c=3 x 108 ms-1.

·         Electromagnetic waves have no mass.

·        As the wavelength in the spectrum decreases, the amount of energy carried by the waves increase. This can be illustrated by the formula,
(where E is the energy, h is Planck's constant, c is speed of light in vacuum and λ is wavelength).

·         Obey the wave equation, v = f λ .

THE END

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oke......

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