The Design of Modern X-Ray Telescopes Depends On

question 4

Multiple Choice

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.