Points of Emphasis
In this lab, the students are asked to:
Measure the rotational velocity of the surface of the sund and teh rotational
period of the sun using the motion of sunspots on its surface. The students use
daily solar images from various internet sites to make their measurements.
Observe the Fraunhofer lines in the spectrum of sunlight, make a sketch of some
of the stronger lines, construct a table of their wavelengths and identify the substances
producing the lines.
Use the Doppler shift of the sprectal lines from reflected sunlight from
Saturn and its rings to measure the rotational period of Saturn. The students
use instructions in a reprinted document from "Sky and Telescope" and images
of Saturn and its rings from the Internet to make their measurements.
Number of set-ups available:
Per lab station:
1 computer connected to the Internet
1 diffraction grating
1 rotating mirror