A. Measuring rod
B. Abney level
C. A ranging pole
D. Theodolite
E. An optical squarer
Correct Answer:
Option E – An optical squarer
Explanation
Surveying or land surveying is the technique, profession, and science of determining the terrestrial or three-dimensional positions of points and the distances and angles between them
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![A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]")
