A laboratory course in experimental physics (1896)
Loudon, W. J. (William James), McLennan, John Cunningham, joint author · New York and London, Macmillan and Co. · leaf 45
e object viewed directly he will see an image of theother part by means ofrays of light coming fromit after having been twicereflected at the mirrors Mand M. This will be evi-dent from Fig. 25, in whichAB and DC are rays comingfrom a very distant object.If this is not the case, thenthe mirrors are… … M Fig. 26. THE SEXTANT. 35 measured; then look through the telescope and the unsilveredglass at the object to the left, and turn the arm EF until theeye sees the image of the second object, after the rays formingit have been twice reflected, coincide with the object seendirectly. The angular…
Physics
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