Why are the designs of the Hubble and Chandra Space Telescopes different?
What will be an ideal response?
Hubble is a Cassegrain reflector, using visible as well as some IR and UV waves. By contrast, Chandra forms its X-ray images with grazing incidence optics. X-ray waves would not be brought to a focus using parabolic (curved) optics.
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Acceleration: Suppose that an object is moving with a constant velocity. Which statement concerning its acceleration must be correct?
A. The acceleration is constantly increasing. B. The acceleration is constantly decreasing. C. The acceleration is a constant non-zero value. D. The acceleration is equal to zero.
Galileo's early telescopes revealed the four large moons of Jupiter, the rings of Saturn, and its large moon Titan
Indicate whether the statement is true or false
Sediments that are composed of solid fragments derived from preexisting rocks are called ______________ sediments
Fill in the blank(s) with correct word
A light ray, traveling parallel to the axis of a convex thin lens, strikes the lens near its midpoint. After traveling through the lens, this ray emerges traveling obliquely to the axis of the lens
A) such that it never crosses the axis. B) crossing the axis at a point equal to twice the focal length. C) crossing the axis at a point equal to one-half the focal length. D) passing between the lens and its focal point. E) passing through its focal point.