What Technique Is Necessary to Produce a Telescope for Focusing

question 120

Multiple Choice

What technique is necessary to produce a telescope for focusing X-rays from astronomical sources?

• A) The telescope must be placed at high-altitude mountain sites because the X-rays penetrate only this far into the atmosphere.
• B) The main mirror must be cooled to prevent the highly energetic X-ray photons from heating and distorting it, thereby producing poor images.
• C) The X-rays must be reflected at grazing incidence to the mirror surface; otherwise they will simply pass straight through the mirror.
• D) The mirror surface has to have a thick aluminum coating in order to reflect the highly penetrating X-rays.

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Definitions:

Oblong

Having an elongated shape, typically rectangular but with the length considerably greater than the width.

Vitreous Humor

A gel-like substance filling the space between the lens and the retina of the eyeball, providing it with shape and a protective environment.

Aqueous Humor

The clear fluid found in the anterior chamber of the eye, contributing to pressure regulation and nutrient distribution within the eye.

Ciliary Body

A ring of tissue behind the iris in the eye that includes the ciliary muscle and ciliary processes, responsible for controlling the shape of the lens for focusing and producing aqueous humor.