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

question 183

Multiple Choice

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.

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