| Light | |||||||
|---|---|---|---|---|---|---|---|
| Light as a wave | Light as a particle (Max Planck) | ||||||
| Properties: continuous and can't break it up into smaller parts | Properties: comes in discrete packages (he called "quanta", basic unit he called "photon", happy now Star Trek geeks) | ||||||
| Analogy: Water (is light/energy) being squirted on You: Comes from a garden hose (as a single stream) |
Analogy: Water (is light/energy) being squirted on You: Comes as a water balloons (know how much water coming at you by size of balloon) |
||||||
| Equation: c = f * lamda c = speed of light (3.00E8 m/s or 3.00E8 m*Hz) f = frequency of light as Hz or 1/s where 1 1/s = 1 Hz lamda (symbol: backwards h, see in example calculations) is wavelength (m or nm) |
Equation (called Planck Equation): E = h*f E - energy of light (in J) h - Planck's constant : 6.60E-34 J/Hz f - frequency of light as Hz or 1/s |
||||||
| Rb 0.8 | Sr 1.0 | ||||||
| Cs 0.7 | Ba 0.9 | ||||||
| Fr 0.7 | Ra 0.9 | ||||||