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At the Equator, the Sun's rays at noon strike the Earth at the angle of 90° above the horizon twice each year.
Emitter
A device or component that releases or sends out something such as energy, signals, or substances.
Amplification Capacity
The ability of an electronic system to increase the power, voltage, or current of a signal.
Transistor
An electronic component that boosts or changes electronic signals and electric power.
Variable Capacitance
A characteristic of some electronic components, such as variable capacitors, where the capacitance can be adjusted or varies according to an external factor.
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