 | Thomas Leybourn - Mathematics - 1830 - 630 pages
...upon the convex surface are as 2 : 3; find the length of the cylinder immersed in each fluid. 1 1 . There are three plane reflectors, two of which are...twice .the angle of incidence upon the first surface. 12. Determine the length of a straight line drawn through the centre of gravity of a given isosceles... | |
 | Miles Bland - Astronomy - 1830 - 394 pages
...whatever be its position, and whatever be the magnitude of its superficies. SECTION II. 1. IF there be three plane reflectors, two of which are at right angles to each other, and a ray of light be incident upon the third, and reflected successively by each of them; prove that the angle between... | |
 | Education - 1832 - 410 pages
...when developed, the form and determine the values of A, B, C, &c. and of the indices of h. OPTICS. 1 . There are three plane reflectors, two of which are...third, and reflected successively by each of them: compare the angle between the first incident and last reflected ray, with the angle of first incidence.... | |
 | Mathematics - 1836 - 366 pages
...passing through each lamina being supposed to be — jj of that which entered it ; then will A: A':: 22. There are three plane reflectors, two of which are...twice the angle of incidence upon the first surface. 23. Investigate the nature of the surface, such that if two lights of given intensities be placed in... | |
 | Stephen Parkinson - Optics - 1859 - 344 pages
...the lust incident ray and a plane perpendicular to the intersection ot the reflecting surfaces. 16. There are three plane reflectors, two of which are...twice the angle of incidence upon the first surface. 17. An oblique cone of rays falls upon a narrow reflecting annulus cut from the surface of a cone by... | |
 | Stephen Parkinson - Optics - 1859 - 336 pages
...the first incident ray and a plane perpendicular to the intersection of the reflecting surfaces. 16. There are three plane reflectors, two of which are...upon the third and reflected successively by each of them;—it is required to shew that the angle between the first incident and last reflected rays is... | |
 | Harvey Goodwin - 1862 - 174 pages
...be incident on the other reflector, in order that after three reflections it may be parallel to BA. 8. There are three plane reflectors, two of which...twice the angle of incidence upon the first surface. 2n reflections is na, and for 2n + l reflections a(w2 + ra+-) , a being a side of the triangle. 10.... | |
 | University of Cambridge - Universities and colleges - 1823 - 374 pages
...upon the convex surface are as 2 : 3 ; find the length of the cylinder immersed in each fluid. 1 1. There are three plane reflectors, two of which are...twice the angle of incidence upon the first surface. 12. Determine the length of a straight line drawn through the centre of gravity of a given isosceles... | |
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There are three plane reflectors, two of which are at right angles to each other, and a ray of light is incident upon the third, and reflected successively by each of them... 