The figures below represent interference fringes. The distances from the screen to the slits is the same for each figure, and the planes of the screen and the slits are parallel. In each figure the spacing d between the slits is the same. Which figure(s) represent(s) slits illuminated with light of the shortest wavelength ?? The white spaces represent the interference maxima.
A. I.
B. II.
C. III.
D. IV.
E. V.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
Exclusion Principle: The elements in the periodic table that have completely filled shells or subshells are referred to as
A. noble gases. B. halogens. C. alkali metals. D. transition elements.
You observe a distant galaxy. You find that a spectral line of hydrogen that is shifted from its normal location in the visible part of the spectrum into the infrared part of the spectrum. What can you conclude?
A) The galaxy is moving away from you. B) The galaxy is moving toward you. C) The galaxy has weak gravity. D) The galaxy is made purely of hydrogen.
In each of the following situations, point charge q moves in a uniform magnetic field B. The strength of the magnetic field is indicated by the density of field lines. In each situation, the initial speed v of the charge is the same. For which situation(s) will the charge q travel the longest distance in a certain time T?
1.1
2.2
3.3
4.4
5.5
6.1 & 3
7.2 & 4
8.1, 2, 3 & 4
9.1, 2, 3, 4 & 5
10.Cannot be determined