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Answers
Answer:
Q-
The photoelectric effect is the emission of electrons when electromagnetic radiation, such as light, hits a material. Electrons emitted in this manner are called photoelectrons. The phenomenon is studied in condensed matter physics, and solid state and quantum chemistry to draw inferences about the properties of atoms, molecules and solids. The effect has found use in electronic devices specialized for light detection and precisely timed electron emission.
Q-The difference between the threshold energy and whatever internal energy molecules have is called the activation energy.
In other words, the activation energy is what you need to supply to the molecules that don't have enough kinetic energy to reach the threshold energy.
Q-
It is the smallest possible unit of something.
Q-Energy is quantized in some systems, meaning that the system can have only certain energies and not a continuum of energies, unlike the classical case. This would be like having only certain speeds at which a car can travel because its kinetic energy can have only certain values.
Explanation:
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