Quantity	Image Type	Features	Formula
Reflection	Virtual    Upright    Same size    Laterally inverted	Image is equal distance behind the mirror as the object is infront.	i = r
Refraction	Virtual    Upright    Enlarged	Image is nearer than the object.	n =  sin i        sin r
Lenses	Real     Inverted    Enlarged/Diminshed Virtual    Upright    Enlarged	Images are of two types: real or virtual	Diagram