Quantum Phenomena

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Quantum Phenomena
We studied light and it was composed as waves,
but it is also a photon. Smallest particle for
light, a small packet of energy.
Planks
Light is bundles of energy called photons and the
amount of energy is proportional to its frequency.
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Electromagnetic spectrum
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Photoelectric Effect
Photons could have enough energy to release
electrons from a piece of photosensitive metal.
Characteristics
The maximum kinectic energy of the emitted
electrons depends on the frequency of the light,
but not on intensity. No photoemission occurs for
light with a frequency below a certain cutoff
frequency Fo, reguardless of the light
intensity. A photocurrent is observed immediately
when the light frequency is great than fo even if
the light intensity is extremely low.
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KE
fo
Frequency
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Atomic
Rutherford's Experiment
Alpha Gun
Thin Gold film
Conclusion 1. Atom mostly empty space. 2. There
must be a positive center. 3. Electrons far away
from the center.
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Bohr's Model
Electrons have different quantum levels.
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Elements
X
A
Z
What binds everything together?
proton
neutron
electron
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Radioactive Decay
Alpha decay
Beta Decay
Gamma Decay
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w
when moving at a very fast rate length gets
shorter time is slower mass gets bigger
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