User: Congress supported construction of the transcontinental railroad by A. paying the costs of construction. B. providing loans and land grants. C. paying for the development of faster steam engines. D. bringing laborers from China to work for low wages.

Weegy: B. providing loans and land grants. The construction and operation of the line was authorized by the Pacific Railroad Acts of 1862 and 1864 during the American Civil War. Congress supported it with 30-year U.S. [ government bonds and extensive land grants of government-owned land. ]
Auto answered|Score 1|jcr.2008|Points 326|

User: Light can be transmitted through long fiber optic strands because of A. refraction. B. external diffraction. C. total internal reflection. D. interference

Weegy: C. total internal reflection.
Auto answered|Score 1|jeifunk|Points 3851|

User: Total internal reflection occurs when the angle of incidence A. is zero. B. is less than the critical angle. C. exceeds the critical angle. D. equals the angle of reflection

Weegy: D. equals the angle of reflection.
Auto answered|Score 1|munnu444|Points 50|

User: Which optical instrument uses a large concave mirror, a plane mirror, and a convex lens to gather light, focus, and enlarge an image? A. refracting telescope B. microscope C. reflecting telescope D. film camera

Weegy: Which optical instrument uses a large concave mirror a plane mirror and a convex lens to gather light focus and enlarge an image? ... [ reflecting telescope with ... http://wiki.answers.com/Q/Which_optical_instrument_uses_a_large_concave_mirror_a_plane_mirror_and_a_convex_lens_to_gather_light_focus_and_enlarge_an_image ]
Auto answered|Score .7445