Prism
In optics a prism is a shape designed to bend or reflect light.
Some scientific instruments, like tachistoscopes, rely on a partially reflective prism, that reflects some light, and lets some light right through.
In optics a prism is a shape designed to bend or reflect light.
Some scientific instruments, like tachistoscopes, rely on a partially reflective prism, that reflects some light, and lets some light right through.