MANIFESTATIONS OF FREQUENCY

Frequency: Number of oscillations or vibrations per second or no. of waves per second or no. of rotations per second or simply number of repetitions per second in a periodic motions.

1. Consider a pendulum. Here no. of swings per second is the frequency. It only depends on the length of pendulum or vibrating body. So the length is the measure of frequency.

2. Consider a rotating wheel. If you multiply frequency of rotations with the circumference of the wheel, you get speed. So frequency determines the speed.

3. Frequency of sound waves gives rise to pitch or tone. A female voice has high frequency.

4. Frequency of electromagnetic waves decides its energy(E= h*freq.). More frequency means more energy. Radio waves, micro waves or light waves have small frequencies and they are not harmful to the human beings. But X-rays, gamma rays, ultraviolet rays have high frequencies and they carry high energies. They are not only harmful but may even kill a person.

5. Light is the form of electromagnetic waves. It's frequency decides wavelength, colour, and energy. Each colour light has its own frequency.

6. Quantum physics says that the sub-atomic particles behave like waves. If we calculate their frequencies, they yield very high value. So we may conclude that at super high frequencies, waves manifest into particles or mass. Example: Electron waves.

7. Electricity generators produce current in the form of sine waves. Here the frequency plays important role in the resistance of electrical circuit.

8. When the cooking vessel is heated, the billions of atoms in the metal vesssel vibrate vigorously. Here, the frequency of vibrations manifest as the heat.
Hence frequency and physics remains intertwined.

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