No object produces a perfect thermal radiation spectrum, but many objects produce close approximations. Which of the following would not produce a close approximation to a thermal radiation spectrum?
A) a hot, thin (low-density, nearly transparent) gas
B) a filament in a standard (incandescent) light bulb
C) a star
D) you
A
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What is the slit spacing of a grating necessary so that 600-nm light will produce a first order principal maximum at 25.0° away from the centerline?
A) 1.42 ?m B) 2.01 ?m C) 3.12 ?m D) 4.12 ?m E) 5.44 ?m
A mid-ocean ridge is formed at the boundary of two plates
a. that are separating from one another. b. that are sliding horizontally past one another. c. where one is pushing over the top of the other. d. that are basically at rest.
How did Alfred Wegener first notice the possibility of plate tectonics? What lies in the gap he noted?
What will be an ideal response?
Constructive interference of two coherent waves will occur if the path difference is
A) 3/4 ?. B) 6/2 ?. C) 3/2 ?. D) 1/4 ?. E) 6/4 ?.