Author Question: The design of modern X-ray telescopes depends on: A) lenses made of germanium. B) the prime ... (Read 123 times)

Redwolflake15 · **on:** Jul 27, 2018

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 2

In terms of temperature alone, there are ________ terrestrial planets within the widest boundaries of the Sun's zone of habitability.

Fill in the blank(s) with correct word