Primary microscopy and biology. A text book for the use of students in high schools, normal schools and academies (1890)
Schneider, Albert, 1863- [from old catalog] · Fairbury, Ill., The Blade printing office · leaf 20
to the sumof the angles of incidence and emergence diminished by therefracting angle. (37) In fig. 7 let A B = the incident ray and 0 G —the emergent ray. G D H will equal total deviation. (1) GDH = DBC + DCB. (2) i — i1 = e — e1. (3) G D H = (i — i1) + (e — e1) = ( i + e) —(i1 + e1) Because of the… … TO FIND OPTIC CENTER OF CONVEX LENS. (37) The incident and emergent rays which enter andleave a lens at the points of contact of two parallel tangentswill be parallel according to Article 3i. The point wheresuch a ray cuts the axis of the lens is called the optic center.It may become necessary to…
Microscopy · Biology
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