A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 608
SECTORS 533 Again, for the critical augle c, sin c = since the index of refrac^jQJgyir a ray passing from the liquid tothe glass is fijfj-.Also, 4mPc + cos2c = l sin2* /x2 + sin2* = /z12, sin2i. From which /x can be found after i has been measured, i^ havingbeen previously determined. Right-angled… … Fig. 533.—Prismatic reflectors. reflections (p. 557) must be avoided, and the tarnishing which anunprotected metallic mirror rapidly undergoes would render its useimpossible. A right-angled prism is then used, as it has neither ofthe above disadvantages. The beam AB, on entering one facenormally at…
Physics
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