Problems in physics. Derived from military situations and experience (1919)
United States. War Dept. Committee on education and special training, Dodge, Homer Levi, 1887- · [Washington? · leaf 189
o eliminate rotation of the imagethat the rotating prism is added, which is so geared to theobjective prism that it rotates at half the angular velocityof the objective prism. If the two ordinary right angleprisms are retained, will the image now be perverted? 87. How will the substitution of a… … ■^ OPTICAL SYSTEMS i53 THE RANGE FINDER 88. Why are penta prisms instead of right angle prisms used at the ends of the base line of the range finder? 89. If an ordinary right angle prism were used instead of the penta prism, through how great an angle would it have to rotatein order to displace the…
Physics · Military art and science
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