HW#13: pg. 130 Rev 1 – 3; CST 1 – 3
Rev 1 – 3
1. List three advantages of reflecting telescopes over refractors.
2. Explain two reasons why astronomers are continually building larger and larger telescopes.
3. What are the advantages of a CCD over a photograph?
CST 1 – 3
1. According to Figure 5.2 ("Refracting Lens"), the thickest lenses deflect and bend light (a) the fastest; (b) the slowest; (c) the most; (d) the least.
2. The main reason that most professional research telescopes are reflectors is that (a) mirrors produce sharper images than lenses do; (b) their images are inverted; (c) they do not suffer from the effects of seeing; (d) large mirrors are easier to build than large lenses.
3. If telescope mirrors could be made of odd sizes, the one with the most light-gathering power would be (a) a triangle with 1-m sides; (b) a square with 1-m sides; (c) a circle 1 m in diameter; (d) a rectangle with two 1-m sides and two 2-m sides.