What is an analog signal?
(N/A) An analog signal is a continuous signal that represents physical measurements. It varies smoothly with time and can take any value within a given range. Examples include sound waves,light intensity,and temperature variations. Unlike digital signals,which are discrete and represented by binary values ($0$ and $1$),analog signals are continuous in both time and amplitude.
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In an amplitude modulation,a modulating signal having amplitude of $X$ Volt is superimposed with a carrier signal of amplitude $Y$ Volt in the first case. In the second case,the same modulating signal is superimposed with a different carrier signal of amplitude $2Y$ Volt. The ratio of the modulation index in the two cases respectively will be:
Which characteristic of a carrier light wave is modulated for the modulation of a light wave?
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