1
Q
Photons
A
“energy packets” of electromagnetic radiation that travel in wave form
- micro waves
- radio waves
- infrared waves
- x-ray waves
- gamma waves
2
Q
Nanometer (nm)
A
ultraviolet light waves units (billionth of a meter)
- or angstroms (A) = 0.1nm
3
Q
Speed of light
A
186,000 miles /sec
300,000 km /sec
- speed of photons
4
Q
The most important factor is ____
A
contrast
- red for visible
- yellow/green for black light (fluorescent)
5
Q
What is Fluorescence
A
process of converting one wavelength to another
- black light 365nm
- causes molecule to become excited, unstable wants to return stable
- releasing built up photon energy at a new wavelength 550nm (green, yellow)
