Quantum Theory

The theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level.

• Quantum Theory

• Wavelength

• Electromagnetic wave theory

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Both _____ and _____ consists of tiny particles which have wavelike properties associated with them.

• Atom,energy

• Atom, matter

• Light,matter

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According to Einstein, light and other forms of electromagnetic radiation consist of discrete, quantized bundles of energy, each of which was later called a ______.

• electron

• photon

• atom

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In 1900, German physicist ________ found that he could calculate the spectrum.

• Max Planck

• James Maxwell

• Heinrich Hertz

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What is the fundamental difference between the Bohr model of an atom and the quantum mechanical model? Select all that apply.

• Bohr model considers electron to be a particle; quantum mechanics considers it to be a wave.

• Bohr model describes electron with 1 quantum number; quantum model uses 4 quantum.

• Bohr model describes electrons in orbits; quantum model describes electrons in orbitals.

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What is the principle of superposition in quantum mechanics?

• The principle that particles can only exist in discrete energy levels

• The principle that particles can exist in multiple states simultaneously until observed

• The principle that the position of a particle can be determined with absolute certainty

• The principle that the speed of light is constant in all inertial frames

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Imagine you are tasked with explaining the concept of quantum entanglement to a group of high school students. Design a simple experiment or demonstration that illustrates the principles of quantum mechanics, including the materials needed and the expected outcomes.

• Use polarized sunglasses and laser pointers to demonstrate how entangled photons react similarly, even when separated, illustrating non-local interactions.

• Drop two balls of different masses from the same height to demonstrate gravity's effect, comparing it to classical mechanics without addressing quantum principles.

• Use a double-slit experiment setup with a laser and a screen to show wave-particle duality, explaining how it leads to the concept of superposition but not directly addressing entanglement.

• Create a computer simulation of the solar system to demonstrate orbital mechanics, focusing on large-scale phenomena rather than quantum-level interactions.

Answer explanation

Using polarized sunglasses and laser pointers to demonstrate entangled photons illustrates non-local interactions, aligning with the principles of quantum mechanics.

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DOK Level 4: Extended Thinking

The quantum mechanics or wave mechanics model, which described the atom using a three dimensional system of waves, was developed by.

• Max Planck

• Albert Einstein

• Erwin Schrodinger

• Louis de Broglie

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Whose model is based on the Uncertainty Principle?

• Schrodinger / Heisenberg

• Bohr

• Rutherford

• Thomson

The Uncertainty Principle holds that it is impossible to determine the location and velocity of an electron at the same time.

• True

• False