Module 2: How We Know What We Know


Figure 6.6 (p. 159) of the text is the graph of an idealized spectrum from an object in space. Learn a little of what you can tell about the object from its spectrum. There are different components of the spectrum - there may be (a) thermal (continuous or "black body") features, and (b) gas emission and/or (c) gas absorption features. In addition, there may be evidence of (d) reflection, (e) absorption, and (f) transmission. Look at the spectrum to see how many of these you can identify.

For homework, use the labeled figure below:


(Also located in the image that is attached to the Activities post in the MSU Module 2 Assignments folder). Portions of the spectrum have been labeled with numbers 1-8. Choose three that represent different kinds of features (a-f, above, but please use the words).

Turn in: List your three choices and the type of feature each is.

In your team, you may wish to discuss how the features were formed - what order, what source each might be.

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last updated 2/3/02