The electrical conductivity of an intrinsic semiconductor is due to the creation of free electrons in the conduction band and _________in the valence band.
Fill in the blank(s) with the appropriate word(s).
holes
Physics & Space Science
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In what wavelength range was interferometry first routinely used?
A) X-ray B) optical C) infrared D) radio E) ultraviolet
Physics & Space Science
A joule/meter (J/m) is a unit of
a. force. b. work. c. energy. d. power.
Physics & Space Science
Doubling the momentum of a particle:
a. does not change its relativistic total energy. b. quadruples its relativistic total energy. c. doubles its relativistic total energy. d. requires less of a speed increase as the speed increases.
Physics & Space Science
If we use the Doppler method to measure the period with which a star alternately moves toward and away from us due to an orbiting planet, then we also know the
A) orbital period of the planet. B) mass of the planet. C) distance to the star. D) radius of the planet.
Physics & Space Science