Problems and ExamplesDeighton, Bell and Company, 1862 - 141 pagine |
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Pagina 126
... mirror of the same height , at a distance of 4 feet from the mirror ; a lamp is placed behind him a height of 11 feet from the ground , and at a distance of 12 feet from the mirror ; find what portion of his person is illuminated , and ...
... mirror of the same height , at a distance of 4 feet from the mirror ; a lamp is placed behind him a height of 11 feet from the ground , and at a distance of 12 feet from the mirror ; find what portion of his person is illuminated , and ...
Pagina 127
... mirror of two feet radius , from the principal focus of the mirror . 7. Given that the distance between the conjugate foci of a concave mirror is equal to the radius , find the focus of incidence . 8. Rays are incident upon a convex mirror ...
... mirror of two feet radius , from the principal focus of the mirror . 7. Given that the distance between the conjugate foci of a concave mirror is equal to the radius , find the focus of incidence . 8. Rays are incident upon a convex mirror ...
Pagina 128
... mirrors ; find the path of the axis of the small pencil of rays , by which an eye placed in a given position between the mirrors , can see the third image proceeding from either side , and shew that its length is equal to the distance ...
... mirrors ; find the path of the axis of the small pencil of rays , by which an eye placed in a given position between the mirrors , can see the third image proceeding from either side , and shew that its length is equal to the distance ...
Pagina 129
... mirror , silvered at the back , that the distance of the image from the first surface may be twice as great as in a mirror of inconsiderable thickness . 2. At the bottom of an empty hemispherical basin a crown piece is placed , and an ...
... mirror , silvered at the back , that the distance of the image from the first surface may be twice as great as in a mirror of inconsiderable thickness . 2. At the bottom of an empty hemispherical basin a crown piece is placed , and an ...
Pagina 134
... mirror , radius 9 inches , at a distance from the mirror equal to one third of its radius ; find the magnitude and position of the image considered as a straight line . 2. A person whose eyes are 5 feet 8 inches from the ground looks ...
... mirror , radius 9 inches , at a distance from the mirror equal to one third of its radius ; find the magnitude and position of the image considered as a straight line . 2. A person whose eyes are 5 feet 8 inches from the ground looks ...
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2nd Edition 3rd Edition 4th Edition acceleration tending arithmetical arithmetical mean arithmetical series bisected centre of gravity chord circle concave cone Conic Sections conjugate convex lens Crown 8vo cylinder determine diameter directrix distance drawn Elementary ellipse English equal equation extremity F. A. Paley Fcap feet Find the number find the value fluid focal length foci focus geometrical progression given point given weight harmonic mean horizontal inches incident inclined plane inscribed intersection Latin latus rectum locus luminous point middle point mirror Multiply parabola parallel particle describes passing perpendicular position Post 8vo pressure prism projected prove pully quantity radii radius ratio reflected refracting respectively shew sides sin² specific gravity sphere spherical square straight line string subtends surface tangent tower velocity vertex vertical
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