The Observed Change in Wavelength of Light Due to the Doppler

question 391

Multiple Choice

The observed change in wavelength of light due to the Doppler effect occurs:

• A) only when the temperature of an object changes.
• B) only when the light source has proper motion (i.e., motion across the line of sight).
• C) whenever the light source is moving with respect to the observer (regardless of direction).
• D) only when the light source has a radial velocity (i.e., motion toward or away from the observer).

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Definitions:

Endorphins

Natural, pain-killing substances produced by the body that also contribute to feelings of pleasure and well-being.

Natural Opiates

Are substances derived from the opium poppy plant that have pain-relieving properties, such as morphine and codeine.

Vestibular Sense

Sense that provides information about balance and movement.

Kinesthetic Sense

A sense that detects bodily position, weight, or movement of the muscles, tendons, and joints.