particle model of waves

4. a tiny bit of matter that makes up everything in the universe
6. a property applying to transverse waves that specifies the geometrical orientation of the oscillations.
8. energy only existing in bundles of specific amounts
10. a type of radiant energy that's invisible to human eyes but that we can feel as heat
12. electrons eject from the cathode only if the frequency of the incident radiation is greater than a certain minimum value
13. the emission of electrons when electromagnetic radiation falls on an object

1. the minimum thermodynamic work needed to remove an electron from a solid to a point in the vacuum immediately outside the solid surface.
2. the physical interaction among electric charges, magnetic moments, and the electromagnetic field.
3. quantized bundles of energy
5. shift in energy of scattered photons
7. the spreading of waves around obstacles.
9. the continuous spectrum or pattern of bright lines or bands seen when the electromagnetic radiation emitted by a substance is passed into a spectrometer
11. energy that comes from a source and travels through space at the speed of light