How does the angular resolution (sharpness)of the images obtained from radio telescopes using very-long-baseline interferometry (VLBI)compare with the typical angular resolution of optical telescopes?
A) VLBI images are about 10 times less sharp than the best optical images.
B) VLBI images are much sharper.
C) VLBI images are much less sharp because of the longer wavelength.
D) VLBI images have about the same resolution as the best optical images, about 0.2 arc seconds.

Question

Quizplus · Accepted Answer

VLBI achieves very high angular resolution, often much sharper than optical telescopes, due to the large effective baseline created by combining signals from widely separated radio telescopes.

How Does the Angular Resolution (Sharpness)of the Images Obtained from Radio