Answer the following statement(s) true (T) or false (F)
In the region where their beams overlap, two car headlights will create a clear interference pattern on a distant screen.
FALSE
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A Teflon rod 6 inches in diameter and 2 feet long is at 230ºF. It is then exposed at one end to cool air so that that end is at 80ºF whereas the cylindrical surface cools to 150ºF. The other end remains at 230ºF. Determine the expected temperature distribution.
What will be an ideal response?
The common name for NH3 is ______________
Fill in the blank(s) with correct word
Argon rather than air is the gas used in incandescent bulbs because
A) it produces a pleasing bluish glow. B) oxygen in air oxidizes the lamp filament. C) argon is relatively plentiful. D) none of the above
An optical fiber is 1.0 meter long and has a diameter of 20 ?m. Its ends are perpendicular to its axis. Its index of refraction is 1.30
What is the maximum number of reflections a light ray entering one end will make before it emerges from the other end? A) 84,000 B) 42,000 C) 26,000 D) 24,000 E) 18,000