Examlex
If you find that the hydrogen alpha line in a star's spectrum occurs at a wavelength of 656.45 nm, what is the star's approximate radial velocity? Note that the rest wavelength of this line is 656.30 nm.
Sudden Infant Death Syndrome
An unexplained death, usually during sleep, of a seemingly healthy baby less than a year old, also known as crib death.
Biofeedback
A technique that involves using electronic monitoring to train individuals to gain control over involuntary bodily functions.
Quiet Sleep
A phase of sleep characterized by the absence of motor activity and reduced sensory responsiveness, often associated with non-REM sleep stages.
Low-Pitched Crying
The vocalization of distress or discomfort by infants with a lower frequency or tone, which may indicate different needs or levels of distress compared to high-pitched crying.
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