What happens when you change the amplitude?

Answer 1

Simple Case:
For simple waves, changing the amplitude does not change any other basic wave characteristic, e.g. frequency, wavelength.

Amplitude is usually associated with the quantification of how much stuff is waving or how strongly it is waving, e.g. water waves and sound waves. It nearly always then is a measure of the energy of a wave which is usually proportional to the square of the amplitude. For sound and similar waves we say a change of amplitude changes the intensity of the wave.

More complex Cases:
The basic characteristics of a simple harmonic wave are the amplitude, frequency and wavelength., There are further longitudinal and transverse waves, so the direction of associated with the movement of whatever is oscillating is another characteristic.

The amplitude of a wave is the measure of the maximum magnitude of whatever is oscillation. For simple harmonic waves, there is a sinusoidally varying quantity which is the amplitude. When the amplitude changes, it is just that magnitude changing or such simple waves. As stated above, this is usually associated with a change of energy or intensity.

For some waves, particularly those which are not simple harmonic waves, change in amplitude can cause other effects. These are called nonlinear effects.

A few examples are known from daily life. A ripple on the surface of water does not have the same properties as a giant ocean wave. In the case of water, amplitude does alter wavelength and frequency. The character of a wave changes. The electrical waves traveling through the electrical circuit of an amplifier for a loudspeaker system have properties that are not simply proportional to amplitude of the signal can can produce those loud screeching noises and distortions. People who wear glasses which darken in bright sunlight are experiencing a nonlinear effect. Even the oscillation of a pendulum is nonlinear with the period of the pendulum changing as the amplitude increases.

Answer 2

It changes brightness

or

It changes light intensity

depends on how you want to word it

Answer 3

actually colour of light is a function of frequency and not of wavelength.so change of wavelength does not change the colour

Answer 4

As amplitude changes, it will change the intensity. the intensity is directly proportional to square of amplitude

Answer 5

When you increase the amplitude in sound it makes the sound louder.

When you increase the amplitude in light it makes the light's intensity brighter.

Answer 6

It changes colour