An optical fiber having index of refraction 1.40 is clad with a material of index of refraction 1.25. What is the critical angle for this fiber?
A. 63.2
B. 26.8
C. 41.8
D. 73.0
E. 16.5
A. 63.2
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A gas in a furnace has an extinction coefficient of 0.01m^-1 and a mean beam length of 10 m. What is the transmissivity of radiation through the gas?
What will be an ideal response?
Glacial striations on the continental landmasses provide evidence
A) that Hawaii was once joined to Alaska. B) of the direction of Pleistocene ice flow. C) that the Cenozoic was a very cool time. D) that Baja California was once joined to Mexico.
Significant Figures: In the sum A + B + C, A is accurate to 5 decimal places, B is accurate to 2 decimal places, and C is accurate to 3 decimal places. What is the correct number of decimal places in the sum?
A. 2 B. 3 C. 4 D. 5 E. 10
At approximately what time would a full Moon be on your Meridian
a) noon b) midnight c) 6pm