When Light from the Concave Primary Mirror of a Telescope

question 229

Multiple Choice

When light from the concave primary mirror of a telescope is reflected by a small secondary mirror through a hole in the primary to its focus, it is called the

• A) Cassegrain focus.
• B) Newtonian focus.
• C) coudé focus.
• D) prime focus.

---

Definitions:

Resize

The action or process of changing the size of an object, such as an image, window, or text box.

Worksheet

A single page in a spreadsheet application, where users can organize, calculate, and analyze data in rows and columns.

Footer

The section at the bottom of a document or web page that is typically used for disclaimers, copyright information, or page numbers.

Current Date

The present day according to a calendar, often used in documents or digital systems to represent the day on which an event occurs or a document is accessed or modified.