The Ideal Shape for the Primary Mirror of a Telescope

question 48

Multiple Choice

The ideal shape for the primary mirror of a telescope is

• A)concave circular.
• B)convex circular.
• C)concave parabolic.
• D)convex parabolic.
• E)plane.

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Definitions:

Hopeless

A feeling of despair or a sense of having no expectation of positive outcomes.

Death Seekers

Individuals who exhibit a strong desire for death, often in the context of suicidal ideation or behavior.

Attempt Suicide

The act of trying to take one's own life but not resulting in death.

Suicide Education Programs

Suicide prevention programs that take place in schools and concentrate on students and their teachers. There are also a growing number of online sites that provide education about suicide—targeting troubled persons, their family members, and friends.