The design of modern X-ray telescopes depends on:
A)lenses made of germanium.
B)the prime focus design, with mirrors made of iron.
C)grazing incidence optics.
D)achromatic lenses to keep the X-rays in focus.
E)the Cassegrain design, with mirrors made of lead.

Question

Quizplus · Accepted Answer

Grazing incidence optics are currently the most common design for X-ray telescopes because they allow for highly efficient focusing of X-rays. The other options are not commonly used because lenses made of germanium or achromatic lenses are not effective for X-rays and the prime focus or Cassegrain designs require large, heavy mirrors that are difficult to manufacture to the necessary precision. Grazing incidence optics are the most commonly used design for X-ray telescopes because they are able to reflect and focus high-energy X-rays, which cannot be done with traditional lenses or mirrors.

The Design of Modern X-Ray Telescopes Depends On