Question 8

The radio-telescope at Arecibo, Puerto Rico, (which is operated by the Cornell University Astronomy Department), has a reflecting spherical bowl of 1000 ft. diameter. Radio signals can be received and emitted at various frequencies with appropriate antennae at the focal point of the reflecting bowl. At a frequency of 300 MHz, what is the angle between two stars that can barely be resolved by this instrument?

• A Need to know distance of the stars
• B 1.0 mrad
• C 0.0033 degrees
• D 4 degrees
• E 3300 rad
• F 4 mrad

Formula Sheet

Question 7

Question 9

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