Napier's Bones Simulation vs CloudLabs Geometric optics

John Napier's contribution to mathematics was truly significant. Born in Scotland, Napier studied as a mathematician, physicist and astronomer. He is best known as the inventor of logarithms, but he also invented one of the first computing devices. The device, known as Napier's Bones, is manually operated and can be used to find the products and quotients of numbers. Napier's device was based on Arab mathematics and used the lattice method of multiplication. Each of the rods are inscribed with the multiplication tables for a specific number. By arranging the rods on the board, the product of two numbers can be found by performing addition operations. Use the Napier's Bones app to learn how one of the earliest calculating devices worked. More than 400 years ago, people used Napier's Bones to find the product of large numbers. In using this simulation you will discover a new way to multiply. Have fun!

In this free practice, a table is available for the study of geometric optics, where it is possible to select and use lenses, mirrors, light sources, test objects, and filters, among other instruments, whose position and angle can be adjusted. The images formed by the objects can be visualized through an electronic eye and the optical phenomena, through an electronic screen.