A student is studying a Fraunhofer diffraction pattern. She measures the distance between the center of one dark fringe and the center of the next dark fringe some small distance from the central maximum, and finds them to be 4 mm apart. To get a high grade on her lab, she should predict that the distance between the dark fringes on either side of the central maximum will be
1.4 mm.
2.2 mm.
3.8 mm.
4.not enough information to predict.
3
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The speed of light is 3.0 × 10^5 km/s, and it takes 1.3 s for light to travel from the Moon to Earth. From this information, what is the distance to the Moon?
a. 390,000 km b. 230,000 km c. 3.9 km d. 2.3 km e. 4.3 × 10^5 km
Aristotle's "continuous" model of matter was proved wrong about 1807 by
a. Bohr. b. Thomson. c. Dalton. d. Rutherford.
Give an example in which thermal energy might be converted to gravitational energy
What will be an ideal response?
Within cosmology, inflation is the idea that
A. the diameters of distant galaxies are much greater than those of galaxies near us. B. the force of gravity suddenly grew stronger in the distant past. C. the number of galaxies we see at large distances is greater than the number we can see near us. D. the Universe increased dramatically in size in an extremely brief period of time.