Final answer:
Large visible-light and radio telescopes differ in their operational wavelengths, with radio telescopes able to observe during daylight and requiring interferometry for high resolutions. Visible-light telescopes often require adaptive optics due to atmospheric effects and are used at night.
Step-by-step explanation:
Observing sessions using large visible-light telescopes and large radio telescopes differ in various ways. The fundamental difference stems from the electromagnetic spectrum each one observes. Radio telescopes operate in the radio frequency portion of the spectrum and have some unique advantages, such as being able to conduct observations during the day because the Sun is not especially bright at many radio wavelengths. This is in contrast to visible-light telescopes which are susceptible to the bright glare of the Sun and are generally used at night. As a result of differences in wavelengths, radio telescopes also require interferometry to achieve high resolution, a technique where multiple antennas are connected to work as an array, overcoming the resolution limitations of individual dishes.
Other considerations include the location of observatories which must be chosen for clear weather, dark skies, and low water vapor for visible-light observations. Adaptive optics in visible-light astronomy can correct for atmospheric turbulence to produce high-quality images, an issue that radio astronomy does not commonly face. Ultimately, the choice between radio and optical telescopes depends on the astronomical phenomena under study and the observational conditions.