1. Everyday Light

2. Optical emission fluorescencephosphorescence

3. Light bulb

5. Neon light Ne Ne +

6. Neon light

8. Fluorescent lights

9. Electrons flow through gas, ionizing the gas Charged particles collide with gaseous mercury Mercury becomes energetically excited Energy is emitted as UV photons UV photons excite phosphors on the inside of the tube phosphors emit fluorescence in the visible range

10. Fluorescent light

11. Bedroom stars Strontium Aluminate Zinc Sulfide

12. Remote control

13. LED: 980 nm

14. Motion sensor

16. Laser pointer

20. Neodymium:Vanadate Potassium Titanium oxide phosphate Absorbs: around 800 nm Fluoresces: @ 1064 nm ‘divides’ wavelength by 2

21. Laser pointer