Nuclear Physics

Annotations:

• Occurs when light shining onto a piece of metal causes electrons to be given off. For most metals UV light is required.

1. Atomic line spectra

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   • The light given out by low-pressure gases when they are exited by heat or electrical discharge. An example of this is given out by neon advertising lights or yellow sodium vapour street lights.

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• In nuclear reactions the atomic number and the mass number are conserved.

1. Binding energy

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   • The amount of energy which must be supplied in order to make up the mass deficit.
2. Nuclear fission

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   • Occurs when a large nucleus split into smaller nuclei. When this happens, a large amount of energy is released as KE and gamma radiation.
3. Nuclear fusion

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   • This is where 2 small nuclei join together to form a larger nucleus. Again large amounts of energy is released.