Behaviour of Amplitude and Frequency in Waves(sound, light, etc...)

In such a big world, Fundamentals always surprise us. Building technology can be only made when the fuel is given to our basics in any field.

let’s stick to our context. Amplitude and frequency plays a major role in projecting the wave.

Amplitude: It is a measure of the quality of energy input and can be easily adjusted using simple volume control.

Frequency: It is a measure of the rate of the wave’s source oscillation. It is difficult to change without altering the generating system itself.

Let’s move on with a small example, We are playing a song in the speaker with low volume. We rotate the knob to increase the volume. Of course, the volume increases.

Does the tune of the song(nothing but a sound wave reaching out ear) change?

No right. Exactly!

Amplitude is changed by varying the power input to the source transducer [ electric current to a speaker or light bulb].

Let’s Go with a second example, A Red🟥 LED bulb is fixed in the top corner of our room. It is so distracting our mood. I would like to change the colour to Blue 🔵. Is it possible just by turning on/switching some button?

No right! Frequency lies here.

Frequency determined by intrinsic physical properties of source material or the oscillation mechanism ( swapping a red led to blue led, tuning a guitar string).

Let’s look into a mathematical notation.

Amplitude is treated as a control variable that scales the intensity or magnitude of an existing wave type.

E is directly proportional to A^2.

Likewise, Frequency is treated as the defining characteristic or identity of the wave itself ( can be color, pitch, radio station channel). It is energy per photon.

Ep = hv.

Finally, Considering our discussion with amplitude and frequency behaviour in terms of waves in our daily life,

We can easily modulate amplitude to send more power. However, changing frequency requires switching the physical generator.