During the past few decades a number of techniques have been developed to enhance the performance of optical and radio telescopes. These include all of the following except one. Which one is the exception?

Question

Quizplus · Accepted Answer

Building lens telescopes comparable in size to the largest mirror telescopes (approximately 10 m) is not a technique that has been developed to enhance the performance of telescopes. While mirror telescopes have been the mainstay of optical telescopes, lens telescopes are not commonly used at such large sizes due to limitations in their manufacturing and support structures.

During the Past Few Decades a Number of Techniques Have