The technique called _______ uses a high-speed computer to monitor atmospheric distortion and adjust the optics of a telescope to partially compensate for the seeing
a. photometry
b. chromatic aberration
c. active optics
d. spherical aberration
e. adaptive optics
e
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Neutron stars are the densest objects that we can observe in the universe
Indicate whether the statement is true or false
Absolute zero is the temperature of
A. frozen water B. the Universe C. liquid helium D. nothing
A current reading is obtained by properly placing an ammeter in a circuit consisting of one resistor and one battery. As a result,
A) the voltage drop across the resistor increases. B) the current flowing in the circuit increases. C) the current flowing in the circuit decreases. D) the current flowing in the circuit does not change.
Constellations look the same from everywhere in the galaxy.
Indicate whether the statement is true or false.