We Can Learn a Lot About the Properties of a Star

question 132

Multiple Choice

We can learn a lot about the properties of a star by studying its spectrum.All of the following statements are true except one.Which one?

• A)The peak of the star's thermal emission tells us its temperature: Hotter stars peak at shorter (bluer)wavelengths.
• B)The total amount of light in the spectrum tells us the star's radius.
• C)We can identify chemical elements present in the star by recognizing patterns of spectral lines that correspond to particular chemicals.
• D)We can look at Doppler shifts of spectral lines to determine the star's speed toward or away from us.

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Definitions:

KUB

An acronym for Kidney, Ureter, and Bladder, referring to an X-ray imaging technique focusing on these abdominal areas.

MRI

Magnetic Resonance Imaging; a medical imaging technique used to visualize internal structures of the body in detail, using magnetic fields and radio waves.

CT

Computerized Tomography, a medical imaging technique that combines multiple X-ray measurements taken from different angles to produce cross-sectional images of specific areas of a scanned object.

Stent-graft

A tube composed of fabric supported by a metal mesh, used to repair damaged or diseased blood vessels.