Tire placard pressure is often much lower than listed on the tire sidewall. Air pressure given by the vehicle maker was based on the tires supplied with the vehicle. They design many newer replacement tires to give a good ride, with much more pressure.
Fresnel lens. A Fresnel lens is a type of lens invented by Augustin-Jean Fresnel. Originally developed for lighthouses, the design enables the construction of lenses of large size and short focal length without the weight and volume of material which would be required in a lens of conventional design. Detailed information.
In many respects, cameras were developed, rather than having been invented by just one person. In 1685, Johann Zahn described, but could not build, a magic lantern device that would capture images. Nicephore Niepce used bitumen to create the first actual photograph in 1825.