The best tech products announced this week include Leica's first 35mm film and McIntosh's special-edition turntable.

When polarized light passes through the Karo syrup, the direction of its polarization is changed. Light vibrating from to side to side, for example, might end up vibrating at a 45-degree angle. The ...

Use the 3/16-in dowel as a handle to gently rotate the upper PVC pipe until the 3/16-in dowel is close to a 45-degree angle with the horizontal. Adjust the position of the foam core and the ...