Concentrate on : light, history of light, and human vision sources of light, color, speed, and interactions refraction and reflection prisms and bringing to a focus lenses, magnification, objects and images microscopes determine the refractive index for all the types of glass used in Brother Gregory's selection of lenses.
(all the types of glass; used; L:in Brother Gregory's selection of lenses)
all the types of glass
used
L:in Brother Gregory's selection of lenses