Physics II Leeson Name____________________________________ Block______ Date___________________ Test III Telescopes I.Matching (2) A. Dobsonian F. Concave B. Focal Length G. Convex C. VLA H. f/ratio D. Skylab I. Electromagnetic spectrum E. Magnification J. German Mount ___1. Several Radio Telescopes connected through computers to act as one huge telescope. ___2. A type of Alt-azimuth mount that is cheap and easy to transport. ___3. The number of times an object is enlarged when seen through a telescope. II. Conversions (2) 2.54cm = ____________in 379cm = _________________m 450cm = _____________mm 423.3mm = _______________cm III. Chronological order. Put a letter on the time-line to represent each event. (2) ____Galileo made his own telescope and pointed it at the sky. ____Newton invented a new type of telescope. ____Eyeglasses were invented. ____Hans Lippershey wrote a paper describing the telescope. ____Kepler modified the basic design of telescopes by trying a different eyepiece. IV. Fill in the blank (2) 1.Light goes through a Refracting telescope ______ times. 2.Light goes through a Newtonian Reflector ______ times. V. Draw the telescopes used by each of the three gentlemen... Galileo, Kepler, Newton. Tell which telescope was for whom, and label the parts. Indicate what types of lenses and/or mirrors they used, so that you will also be giving the development of the telescope. Hint: each one had a tube and 2 (or 3) pieces of glass. (5) VI. Paragraph - What important things did Galileo do with his telescopes? VII. Label each according to the photos shown (2) Num. Optical Scheme Mounting Scheme 1 2 3 XXXXXXXXXXXXXXXXXXXX 4 5 6 7 8 9 10 XXXXXXXXXXXXXXXXXXXX 11 XXXXXXXXXXXXXXXXXXXX VIII.Problems – Show all work and equations. Put answers in the blanks to the left of the questions. Diagrams may be helpful. (4) ____________If the objective lens of your refracting telescope has a focal length of 40cm, and you observe an object that is 231cm away, how far will your eyepiece be from the objective lens?