| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 6B10.00 | Luminosity | | |
| 6B10.10 | checker board | PIRA 500 | |
| 6B10.10 | checker board | 6B10.10 | Use a point source to superimpose shadows of a rectangle and a 3h x 3w checkerboard rectangle. |
| 6B10.10 | inverse square law | Oi-1 | A rectangular paddle and a 3Hx3W paddle are placed so shadows overlap and the distances are measured. |
| 6B10.15 | inverse square model | PIRA 200 | A wire frame pyramid connects areas of 1, 4, and 16 units. |
| 6B10.15 | inverse square model | O-1b.1 | A wire frame pyramid connects areas of 1, 4, and 16 units. |
| 6B10.20 | inverse square law with photometer | PIRA 1000 | |
| 6B10.20 | inverse square with photocell | L-11 | Double and triple the distance from an arc source to a photocell connected to a galvanometer. |
| 6B10.20 | foot-candle meter | O-1b.2 | Use a Weston type foot-candle meter to measure the inverse square law. |
| 6B10.20 | inverse square law | Disc 21-10 | Double and triple the distance between a source and photometer. Graph. |
| 6B10.30 | paraffin block photometer | PIRA 500 | |
| 6B10.30 | paraffin block photometer | 6B10.30 | Two large paraffin blocks with tin foil sandwiched in between make a sensitive photometer. Use with lamps on either side. |
| 6B10.30 | paraffin blick photometer | Oi-4 | Two paraffin blocks separated by an aluminum sheet are moved between two light sources until they appear equally bright. |
| 6B10.30 | Joly diffusion photometer | L-12 | Tin foil is sandwiched between two blocks of paraffin. Can be mounted in a box for greater accuracy. |
| 6B10.35 | grease spot photometer | PIRA 1000 | |
| 6B10.35 | grease spot photometer | Oi-3 | A piece of paper with a grease spot is moved between two light sources until the spot disappears. |
| 6B10.35 | Bunsen grease-spot photometer | L-14 | A grease spot disappears when illuminated equally from both sides. Diagram of a grease-spot box. |
| 6B10.40 | Rumford shadow photometer | PIRA 1000 | |
| 6B10.40 | Rumford photometer | Oi-2 | Light sources are moved until their shadows of the same object are of equal intensity. |
| 6B10.40 | Rumford shadow photometer | L-13 | Two light sources are moved so the shadow cast by a vertical rod is of the same intensity. |
| 6B10.50 | frosted globe - surface brightness | PIRA 1000 | |
| 6B10.50 | frosted globe - surface brightness | 6B10.50 | The surface brightness of a 40 W bulb is compared to a frosted globe placed over it. |
| 6B10.50 | surface brightness | Oi-6 | A lamp with measured candlepower is enclosed in a frosted globe. |
| 6B10.55 | frosted globes | PIRA 1000 | |
| 6B10.55 | frosted globes | 6B10.55 | |
| 6B10.60 | surface brightness of a lens | Oi-8 | Place the eye at the image point of a lens focused on a dim lamp. |
| 6B10.65 | reflected surface brightness | Oi-7 | With
a bright spot at the object point of a concave mirror and the eye at the
image point, the whole mirror seems to have the same surface brightness as
the spot. |
| 6B10.70 | laser and light bulb | AJP 43(1),111 | A .5 mW laser beam can be seen on the glass beside the bright center of a 25 W frosted incandescent bulb. |
| 6B10.80 | covered strobe and detector | Oi-5 | The
amplitude of a signal displayed on an oscilloscope from a translucent covered
photodetector and from a translucent covered strobe changes as the angles
and distances are changed. |