The way those resistors are twisted together makes my heart hurt....
Another fun fact about light and semiconductors is that the first commercial digital camera - the Cromemco Cyclops - used a 32x32 memory ic that used a windowed dip package so the chip was exposed to light. The memory was refreshed to all 1's, and the light would flip them back to 0's with the strongest light flipping the bits the fastest. The times were then parsed and converted to pixel values.
I didn't know about the Cromenco camera but I remember seeing the trick in electronics/robotics books from the seventies. Micron sold a windowed DRAM for that purpose back in the early eighties, and I think a camera too. There was a construction article in BYTE.
If you had the appropriate resistor on hand, you could just a male-to-female jumper to span the distance. Have one lead of the resistor plugged into the female end, and it serves the same purpose as the 3 resistors twisted together.
No sense in soldering this together just for a quick-and-dirty demo, right?
That reminds me of a certain edutainment video on shutter-speed and CCDs [0] from long-term Youtube persona "Captain Disillusion". (Skip to ~4m for the CCDs.)
Another fun fact about light and semiconductors is that the first commercial digital camera - the Cromemco Cyclops - used a 32x32 memory ic that used a windowed dip package so the chip was exposed to light. The memory was refreshed to all 1's, and the light would flip them back to 0's with the strongest light flipping the bits the fastest. The times were then parsed and converted to pixel values.