Geometrical Optics

Alhazen angle of incidence Aq AQ beam called Cambridge caustic curve centre Christ's College circle Clifton College cloth colours concave lens CONIC SECTIONS conical shell converge convex lens cornea course Crown 8vo curved surface cut the axis dense medium direction EDUCATIONAL BOOKS ELEMENTARY TREATISE emergence English Extra fcap eye-lens figure focal length Geometrical Focus GEOMETRICAL OPTICS glass HISTORY image of Q late Fellow lenses Let Q luminous point minimum deviation mirror nearer nearly normal numerous Examples object object-glass Owens College parallel rays pencil of light pencil of rays perpendicular placed plane reflexion point q position principal focus prism Professor q₁ ray of light rays fall rays from Q rays pass rays which fall reflected rays reflecting telescope refraction retina Schools Second Edition seen shade shew small pencil spherical surface straight line Suppose telescope Third Edition WELLINGTON COLLEGE