| E+60+5 | Total internal reflection/critical angle: Nakamura water tank. | 2020-01-30 |
| E+10+0 | Single slit diffraction using laser beam through adjustable slit. | 2020-02-13 |
| E+50+20 | Refraction of white light by prism using arc lamp. | 2020-01-30 |
| E+40+30 | Reflections from concave and convex mirrors with lighted arrow. | 2020-01-30 |
| E+30+15 | Real images: Lighted arrow image and various lenses. | 2020-02-04 |
| E+45+60 | Polarized light and stressed lucite on an OHP. | 2020-02-18 |
| E+40+10 | Phantom lightbulb: Image in a plane mirror. | 2020-01-28 |
| E+30+65 | Model of the eye, with near/far sight lenses, using arc lamp. | 2020-02-06 |
| E+25+10 | Microwave interference with single and double slits. | 2020-02-11 |
| E+45+10 | Malus experiment: Polarization by reflection off glass surface. | 2020-02-20 |
| E+45+10 | Malus experiment: Polarization by reflection off glass surface. | 2020-02-18 |
| E+40+42 | Light the Match (same as C+65+2). | 2020-02-04 |
| E+25+15 | Laser beam through various slit and grating combinations. | 2020-02-11 |
| E+30+50 | Galilean telescope: similar to E+30+45. | 2020-02-06 |
| E+15+20 | Diffraction patterns of various gratings using He-Ne laser. | 2020-02-13 |
| E+10+15 | Diffraction about pinhead, razorblade, wood screw using laser. | 2020-02-13 |
| E+45+25 | Commercial Polaroid filters on an OHP. | 2020-02-18 |
| E+40+5 | Blackboard optics: Light sources with plane and curved mirrors. | 2020-01-28 |
| E+40+5 | Blackboard optics: Light sources with plane and curved mirrors. | 2020-01-30 |
| E+30+10 | Blackboard optics: Light sources with lucite lenses. | 2020-02-04 |
| A+50+35 | Ballistics car: Ball ejected from rolling car drops back in. | 2020-02-20 |
| E+10+10 | Airy's disk: Pinhole diffraction using laser beam. | 2020-02-13 |
| E+15+15 | Absorption spectrum of Na using arc lamp, slit and grating. | 2020-02-18 |
