The angular resolution of the largest single-dish radio telescope in the United States,the 300-ft Green Bank Telescope,is __________ when it operates at a wavelength of 20 cm.
A) 0.12°
B) 0.12 arcmin
C) 0.12 arcsec
D) 12 arcsec

Question

Quizplus · Accepted Answer

The angular resolution of a telescope is given by the formula θ = 1.22 * (λ/D), where λ is the wavelength and D is the diameter of the telescope. For the Green Bank Telescope with a diameter of 300 ft (approximately 91.44 meters) and a wavelength of 20 cm (0.2 meters), the resolution is approximately 0.12 degrees.

The Angular Resolution of the Largest Single-Dish Radio Telescope in the United