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What Did Einstein Say About Light?

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Presentation on theme: "What Did Einstein Say About Light?"— Presentation transcript:

1 What Did Einstein Say About Light?
It is both a wave and a particle.

2 Louis de Broglie, (France, 1892-1987) Wave Properties of Matter (1923)
-Since light waves have a particle behavior (as shown by Einstein in the Photoelectric Effect), then particles could have a wave behavior. -He suggested electrons could be considered waves confined to a space around an atomic nucleus

3 Light versus Electron Diffraction

4 Electrons: Waves and Particles?
Big problem …. If electrons are both particles and waves, then where are they in the atom?

5 Werner Heisenberg: Uncertainty Principle
We can not know both the position and momentum of a particle at a given time. (1927)


7 Erwin Schrodinger, 1925 Quantum (wave) Mechanical Model of the Atom
-Developed equation (wave equation) that treated electrons in atoms as waves. -Only waves of specific energies provided solutions to his equation. -Along with Heisenberg principle, this wave equation laid the foundation for modern quantum theory

8 Be Curious … Although Curiousity Killed the Cat
Schrodinger’s Cat Hugh Everett

9 What Schrodinger’s Equation Means to Chemists
Electrons do not travel around the nucleus in neat orbits. We only have a probability of finding an electron at a given place around the nucleus. -Electrons exist in orbitals that have three dimensional shapes. These orbital shapes are described by the solutions to Schrodinger’s wave equation for different energies. -Property of orbitals can be described by 4 quantum numbers.

10 Four Quantum Numbers -Principal Quantum Number (n)
-Orbital Quantum Number (l) -Magnetic Quantum Number (m) -Spin Quantum Number

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