A Collection of Problems and Examples Adapted to the "Elementary Course of Mathematics.": With an Appendix Containing the Questions Proposed During the First Three Days of the Senate-House Examinations in the Years 1848, 1849, 1850, and 1851J. Deighton, 1851 - 173 páginas |
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Página 103
... lens through which it must be viewed , that its apparent depth may be 10 feet ? 2. If an object is placed in the focus of a convex lens , the visual angle is the same whatever is the distance of the eye from the glass . 3. Given the ...
... lens through which it must be viewed , that its apparent depth may be 10 feet ? 2. If an object is placed in the focus of a convex lens , the visual angle is the same whatever is the distance of the eye from the glass . 3. Given the ...
Página 104
... lenses are as p : q ; required the ratio of the radii of their second surfaces . 9. The radii of the surfaces of a double convex lens are 1 and 6 inches , and the refracting index 1.6 ; find the focal length . 10. The first surface of a ...
... lenses are as p : q ; required the ratio of the radii of their second surfaces . 9. The radii of the surfaces of a double convex lens are 1 and 6 inches , and the refracting index 1.6 ; find the focal length . 10. The first surface of a ...
Página 105
... lens , so that the image may be twice as great as the object and erect . 6. An object is placed at a distance of 4 inches from a concave lens of 2 inches focal length ; is the image erect or inverted ? 7. Two convex lenses , of 3 inches ...
... lens , so that the image may be twice as great as the object and erect . 6. An object is placed at a distance of 4 inches from a concave lens of 2 inches focal length ; is the image erect or inverted ? 7. Two convex lenses , of 3 inches ...
Página 106
... lens , which being interposed between his eye and the former lens will be sufficient for that purpose . 6. Why cannot a person see his own image distinctly when looking into a concave reflector , his eye being between the centre of the ...
... lens , which being interposed between his eye and the former lens will be sufficient for that purpose . 6. Why cannot a person see his own image distinctly when looking into a concave reflector , his eye being between the centre of the ...
Página 107
... lens nearest to it . 5. The magnifying power of an opera - glass , when di- rected to a distant object , is 4 ; but ... lenses , two of which form the eye - piece ; prove that if the focal length of these two be 3a and a respectively ...
... lens nearest to it . 5. The magnifying power of an opera - glass , when di- rected to a distant object , is 4 ; but ... lenses , two of which form the eye - piece ; prove that if the focal length of these two be 3a and a respectively ...
Otras ediciones - Ver todas
A Collection of Problems and Examples, Adapted to the Elementary Course of ... Harvey Goodwin Sin vista previa disponible - 2019 |
A Collection of Problems and Examples Adapted to the 'Elementary Course of ... Harvey. Goodwin Sin vista previa disponible - 2015 |
A Collection of Problems and Examples, Adapted to the 'Elementary Course of ... Harvey Goodwin Sin vista previa disponible - 2010 |
Términos y frases comunes
angular points arithmetical arithmetical mean arithmetical series axis base bisects centre of gravity chord circle concave convex lens cos² cosec curve cylinder Describe determine diameter direction distance Divide drawn elastic balls ellipse equal equation equilibrium feet find the height Find the number find the position Find the velocity fluid focal length force geometrical focus geometrical progression geometrical series given point given velocity given weight horizontal plane hyperbola immersed inches incident inclined plane inscribed latus rectum luminous point mirror motion moving Multiply observed parabola parallel parallelogram pencil of rays perpendicular placed pressure proportional prove pullies quantities radii radius ratio reflexion refracted respectively right angle shew sides sin² specific gravity sphere spherical square St John's College straight line string passing Subtract surface tangent tower triangle vertex
Pasajes populares
Página 111 - If two triangles have two sides of the one equal to two sides of the...
Página 128 - To divide a given straight line into two parts, so that the rectangle contained by the whole and one of the parts, shall be equal to the square of the other part.
Página 111 - If a straight line be divided into two equal parts, and also into two unequal parts, the rectangle contained by the unequal parts, together with the square on the line between the points of section, is equal to the square on half the line.
Página 112 - EQUAL straight lines in a circle are equally distant from the centre ; and those which are equally distant from the centre, are equal to one another.
Página 144 - ... a circle. The angle in a semicircle is a right angle: the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Página 160 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Página 112 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Página 160 - In any right-angled triangle, the square which is described upon the side subtending the right angle, is equal to the squares described upon the sides which contain the right angle.