Nature, Količina 11Sir Norman Lockyer Macmillan Journals Limited, 1874 |
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Zadetki 1–3 od 82
Stran 51
... reference the rate of variation of index must continually increase in direct proportion to the dis- tance . The rate must also be the same at equal distances above and below this plane of reference . The curvature of a horizontal , or ...
... reference the rate of variation of index must continually increase in direct proportion to the dis- tance . The rate must also be the same at equal distances above and below this plane of reference . The curvature of a horizontal , or ...
Stran 52
... reference , and the horizontal distance between the two being the same as in the preceding case . This property is illustrated by Fig . 2 . It is obvious that the conjugate foci will occur not in pairs merely , but in sets of unlimited ...
... reference , and the horizontal distance between the two being the same as in the preceding case . This property is illustrated by Fig . 2 . It is obvious that the conjugate foci will occur not in pairs merely , but in sets of unlimited ...
Stran 69
... reference , while on the other side of this plane the density is uniform , we shall have conjugate foci for points in the plane of reference , but for no other points . The conjugate foci will themselves be in the plane of reference ...
... reference , while on the other side of this plane the density is uniform , we shall have conjugate foci for points in the plane of reference , but for no other points . The conjugate foci will themselves be in the plane of reference ...
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