What is an advantage of the Keplerian telescope?

• A. It is more compact
• B. The image is upright
• C. The field of view is larger
• D. The design is simpler

Answer: (C)

The advantage of the Keplerian telescope being associated with a larger field of view relates to its optical design, which allows for a greater overall area to be observed when looking through the instrument. The design includes two convex lenses, which work together to focus light and provide a more detailed and expansive view of celestial objects. This capability makes it particularly effective for astronomical observations, where expansive view and detail are crucial.

In contrast, other telescopes, such as Galilean telescopes, often provide a more limited field of view or require a more complex setup to achieve a wider observation area, which can restrict what can be viewed at any one time. The characteristics of the Keplerian design, therefore, provide significant benefits for wide-field observations compared to other optical configurations.