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.

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Definitions:

Stammering

A speech disorder characterized by involuntary repetitions and prolongations of sounds, syllables, or words.

Lisp

A speech impediment that affects the pronunciation of sibilants, causing them to be pronounced with a "th" sound.

Magical Thinking

The belief that one's thoughts, wishes, or desires can influence the physical world; common in children and certain psychiatric conditions.

All-Powerful

Having complete power and influence over others or situations; omnipotent.