In the two-slit experiment, monochromatic light of wavelength 600 nm passes through a pair of slits separated by 2.20 x 10-5 m
(a) What is the angle corresponding to the first bright fringe?
(b) What is the angle corresponding to the second dark fringe?
(a) 1.56°
(b) 1.56°
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Why is the inner core solid even though it is hotter than the outer liquid core?
A. The dynamo effect causes ions in Earth's interior to become solid. B. The great pressure at Earth's center forces the atoms in the core together, causing it to solidify. C. Radioactivity causes liquid materials to become solid. D. This is not unusual: hotter things tend to be more solid.
A ray of light strikes a thick sheet of glass (n = 1.5) at an angle of 22° with the normal. Find the angle of the ray reflected off the glass surface with respect to the normal
a. 33° b. 50° c. 14° d. 22° e. 15°
A 2.00-m-long 6.00-kg ladder pivoted at the top hangs down from a platform at the circus. A 42.0-kg trapeze artist climbs to a point where her center of mass is at the center of the ladder and swings at the system's natural frequency. The angular frequency (in s?1) of the system of ladder and woman is
a. 1.01. b. 3.07. c. 4.03. d. 8.05. e. 16.2.
For a standing wave on a string, the wavelength must equal:
a. the distance between adjacent nodes. b. the distance between adjacent antinodes. c. twice the distance between adjacent nodes. d. the distance between supports.