Astronomers Can Determine the Maximum Size of a Distant, Luminous

question 70

Multiple Choice

Astronomers can determine the maximum size of a distant, luminous object by

• A) directly resolving it in a telescope only.
• B) using trigonometric parallax.
• C) timing the fluctuations in its luminosity.
• D) looking for the amplitude of an oscillating Doppler shift.
• E) using the phenomenon of radio wave diffraction.

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