The amount of diffraction a telescope creates depends upon:
A) whether the telescope is a refractor or a reflector.
B) the wavelength and the diameter of the telescope objective.
C) the magnification of the eyepiece.
D) the types of glass used in the achromat.
E) the transparency of the atmosphere.
B
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When waves interfere, the result is ________ original waves ("they interfere")
A) always smaller than B) always larger than C) always the same as D) sometimes smaller than, sometimes larger than
What is the equivalent resistance between points A and B in the figure when R = 10 ??
A. 20 ? B. 10 ? C. 25 ? D. 15 ? E. 3.2 ?
Define electrolysis