To focus X rays, such as those collected in the Chandra X–Ray Observatory, it is necessary to use a.a lens. b.a concave glass mirror, such as that used in an optical reflecting telescope. c.a metal dish, such as that used in a radio telescope. d.grazing incidence optics shaped like a converging, hollow tube. e.a mesh of conducting wires.

Introduction: The Chandra X–Ray Observatory is a Flagship-class space telescope sensitive to X-ray…

Answered: To focus X rays, such as those…

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	a.	a lens.
	b.	a concave glass mirror, such as that used in an optical reflecting telescope.
	c.	a metal dish, such as that used in a radio telescope.
	d.	grazing incidence optics shaped like a converging, hollow tube.
	e.	a mesh of conducting wires.