It is not true that the neutrino
a. is an elementary particle.
b. interacts extensively with other particles.
c. has no electric charge.
d. travels at or near the speed of light.
b
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A high f-number:
a. allows using a slower shutter speed. b. causes more spherical aberration. c. allows a larger depth of focus. d. is not related to any of the above options.
A beam of electrons is accelerated through a potential difference of 10 kV before entering a velocity selector
If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected? A) 2.3 × 103 V/m B) 7.9 × 103 V/m C) 5.9 × 105 V/m D) 6.0 × 105 V/m E) 7.2 × 106 V/m
A camera records what type of image?
A. Virtual only B. Real or virtual C. Real only D. Electronic
The bright light at the center of a shadow cast by a penny
1.supports the hypothesis that light can be viewed as rays traveling in straight lines. 2.results from the re-reflection of the diffraction pattern cast by the penny. 3.is the result of the penny's shininess; it acts like a mirror providing a second source to create an interference pattern. 4.is the central maxima of the interference pattern caused by the diffraction effects around the penny.