Geometrical Optics: Adapted to the Use of the Higher Classes in Schools, Etc |
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Page 71
... . Therefore the prism through which no ray can pass is that where the refractive angle of the prism = twice the critical angle of the medium . CHAPTER X. Lenses . 60. A lens is a portion IX . ] 71 REFRACTING PLATES AND PRISMS .
... . Therefore the prism through which no ray can pass is that where the refractive angle of the prism = twice the critical angle of the medium . CHAPTER X. Lenses . 60. A lens is a portion IX . ] 71 REFRACTING PLATES AND PRISMS .
Page 72
... lens is a portion of a refracting medium bound- ed by two spherical surfaces : the straight line joining their centres being called the axis of the lens . This definition includes ... lens . 1 61. One of the earliest notices of a lens is.
... lens is a portion of a refracting medium bound- ed by two spherical surfaces : the straight line joining their centres being called the axis of the lens . This definition includes ... lens . 1 61. One of the earliest notices of a lens is.
Page 73
... lens is in the writings of Seneca , A.D. 64 ( Nat . Quest . lib . 1. ch . 7 ) , in which he states the fact that objects seen through a ball of glass full of water appear larger ... lens . The axis of the pencil CHAP . X. ] 73 LENSES .
... lens is in the writings of Seneca , A.D. 64 ( Nat . Quest . lib . 1. ch . 7 ) , in which he states the fact that objects seen through a ball of glass full of water appear larger ... lens . The axis of the pencil CHAP . X. ] 73 LENSES .
Page 74
... lens . The axis of the pencil is therefore QAB , a common diameter of the spherical surfaces . Fig . 45 . 94 Let ( r ) and ( s ) be the radii of the spherical surfaces ( 4 ) and ( B ) . Let q , and q be the geometrical foci of the pen ...
... lens . The axis of the pencil is therefore QAB , a common diameter of the spherical surfaces . Fig . 45 . 94 Let ( r ) and ( s ) be the radii of the spherical surfaces ( 4 ) and ( B ) . Let q , and q be the geometrical foci of the pen ...
Page 75
... lens and AE its “ focal length . " This is usually written f . Thus I I I - Aq I = I AQF ' where q is the geometrical focus for any point Q. If r and s are equal I = ± 2 ( μ- I ) f for double concave ... lens I I Aq ̃ AQ = X. ] 75 LENSES .
... lens and AE its “ focal length . " This is usually written f . Thus I I I - Aq I = I AQF ' where q is the geometrical focus for any point Q. If r and s are equal I = ± 2 ( μ- I ) f for double concave ... lens I I Aq ̃ AQ = X. ] 75 LENSES .
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a₁ acceleration angle angular velocity arrow axes axis of rotation axle center of gravity cloth coefficient of friction compression concurrent forces consider constant cord cos² couple Crown 8vo curve cylinder diameter direction disk distance dt dt Edition equal fcap Find the center fly wheel forces acting formula gravity axis hammer horizontal inch inertia with respect kinetic energy length lens line of action M₁ M₂ mass mirror moment of inertia motion moving P₁ P₂ pencil pendulum perpendicular plane point of application preceding problem prism pulley R₁ radians per second radius rays refraction represented resistance revolutions revolutions per minute rigid body seen shaft shown in Fig Simpson's Rule speed square Suppose surface T₁ tangential tension tion v₁ vertical weight work-energy equation x-axis zero