Compared with the Spectral Lines in the Solar Spectrum, Lines

question 28

Multiple Choice

Compared with the spectral lines in the solar spectrum, lines in a supergiant spectrum are

• A)sharper.
• B)broader.
• C)weaker.
• D)stronger.
• E)broader and weaker.

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Definitions:

Circular Pitch

In gear design, the distance measured along the pitch circle between corresponding points on adjacent teeth.

Root Diameter

The diameter of a gear or screw measured at the base of the teeth or threads, where the material is the thickest.

Bevel Gears

Gears with intersecting shafts and conically shaped teeth that are used to change the axis of rotation in machinery.

Intersecting Axes

The point or line where two or more axes meet or cross each other.