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Wave Optics
Question
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What are the different parameters or characteristics of a carrier wave which are varied in accordance with the modulating or message signal?

Answer

The parameters of carrier wave that vary in accordance with the modulating or message signal, in case of a sinusoidal wave are:

(a) Amplitude
(b) Frequency
(c) Phase.

And, in the case of pulsed wave the parameters varying are:

(a) Amplitude of pulse
(b) Width of pulse
(c) Position of pulse.

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