Select the option from each drop$-$down that best completes the corresponding sentence.

The role of a telescope is to take in as muchlightas possible and to focus the collected light into a coherent image. With this goal, a telescope is designed with several features including: a light collecting area, an angular resolution, a focusing mechanism, and the ability to magnify images. The least important of these four is $-$ In addition to these light transforming features of a telescope, special telescopes are designed to collect light from different frequencies. A problem that arises as the wavelength of light decreases is that light waves begin to behave more $$ This is the reason why $$ uses $$ On the other end of the spectrum, as the wavelength of light increases, we face the problem that our telescopes must accommodate $$ This is why the $$ is designed $$ with a diameter of $$

$2$ kilometers

$6\mathrm{.}5$ meters $500$ meters $0\mathrm{.}8$ meters Finish attempt