A spectrograph spreads out light according to ____ to form a spectrum
a. wavelength
b. frequency
c. interference
d. aberration
e. grating
a
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When ice water at 0°C is heated
A) thermal expansion occurs. B) thermal contraction occurs. C) both occur until 4°C is reached
Consider an infinite pipe that conducts current along its length. The magnetic field that this pipe creates is
A. unidirectional. B. circular. C. axial. D. None of the above.
Why is the primordial background radiation visible in all directions?
What will be an ideal response?
A solar prominence is essentially
A. an aurora occurring in the Sun's atmosphere instead of Earth's. B. a plasma confined to a magnetic tube sticking out of the surface of the Sun. C. an eruption of gas heated by the sudden recombination of opposite polarity parts of the Sun's magnetic field. D. a cloud of hot gas lifting off the surface of the Sun.