Using a double-slit with a d = 300 nm and light of a wavelength of 400 nm, what would you see on a distant screen?
A. the intensity is maximum at the center and gradually decreases to either side
B. the intensity is minimal at the center and gradually increases to either side
C. the intensity is maximum in a single narrow line at the center
D. the intensity is minimal in a single narrow line at the center
A. the intensity is maximum at the center and gradually decreases to either side
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A car travels on a road that, if viewed from the side, has a semicircular bump. When at the top of the bump, the occupants of the car feel as though they weigh half their normal weight. What is the speed of the car if the radius of the semicircle is 120 m?
A. 107 m/s B. 53.7 m/s C. 34.3 m/s D. 24.3 m/s
What is the relationship between the image distance and the object distance for a plane (flat) mirror?
A. They are not related B. The image distance is double the object distance C. The image distance is half the object distance D. They are the same.
The current definition of the standard second of time is based on
A) the frequency of radiation emitted by cesium atoms. B) the earth's rotation rate. C) the duration of one year. D) the oscillation of a particular pendulum kept in France.
A beam of electrons moves at velocity 
. The number of particles per unit volume in the beam of area A is ?. If we imagine a cylindrical Gaussian surface of radius r and length 
centered on the beam, the electron flux through the surface is
A.
B.
C.
D.
).E.
).