A telescope has a two ft mirror. How far apart in angle can the instrument distinguish two individual stars for blue (420 nm) light? How about for red (650 nm) light? The Very Large Array in New Mexico consists of a large number of radio telescopes arranged in a Y-pattern that is basically equivalent to a disk of 36 km in diameter. It senses radio waves in the range from 72 to 50,000 MHz. At 72 MHz, what is the minimum angular separation that it can recognize individual sources? How about for 50,000 MHz?