The step missing is after the number 4. Because, after the antenna captures de modultates waves, it has to be demodulated in order to be able to the signal be heard, seen or used.
So, the answer is that waves are demodulated and it before the signal is heard, seen or used.
Astronomers use the doppler effect to study the motion of objects across the Universe.
Explanation:
The phenomenon of superimposing of two waves such that the resultant wave have greater, lower, or the same amplitude.
There are two conditions for the interference.
- Constructive wave interference: This type of interference occurs after adding of two maxima such that the amplitude of the resulting wave is equal to the sum of the amplitudes of individual waves.
- Destructive wave interference: In this type of interference, the amplitude of the resulting wave gets reduced as the crest of one wave meets with the trough of another wave.
Answer:
D
Explanation:
Emerald is not a variety of corundum rather its a variety of beryl.
A precious or semiprecious stone may or may not be transparent.
The value of gemstone is derived mostly by its rarity.
Pegmatite are igneous rocks found underground near sheets of igneous rocks called batholiths. They are a source of gemstones made of topaz, tourmaline, beryl spodumene and spessartine.
