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.
Though Canon is widely recognized as the creators of the best cameras in the world, it is a shock knowing that the credit to this invention goes to Kodak and not Canon. A Kodak engineer by the name of Steven Sasson invented the first digital camera in 1975. Since then, this technology has evolved our lives greatly.