Refracting telescopes and reflecting telescopes both gather light to magnify distant objects, but they do so using different optical components. A refracting telescope uses a curved glass lens at the front of a sealed tube to bend and focus light directly to the eyepiece. In contrast, a reflecting telescope uses a curved mirror at the bottom of an open tube to bounce light back up to a secondary mirror, which then directs it to the eyepiece. While refractors are highly durable and require little maintenance because of their sealed design, reflectors are generally cheaper to manufacture at larger sizes, making them more popular for viewing faint deep-space objects.
Based on the passage, how do refracting and reflecting telescopes primarily differ in their optical design and construction?
- Refracting telescopes focus light using a curved glass lens, while reflecting telescopes focus light using a curved mirror.Answer
- BRefracting telescopes require frequent lens adjustments, while reflecting telescopes never require any optical alignment.
- CRefracting telescopes are cheaper to manufacture at large sizes, while reflecting telescopes are more durable due to their sealed design.
- DRefracting telescopes bend light to magnify objects, while reflecting telescopes only view faint deep-space objects.