When using light as a zeitgeber, which of the following will cause a larger phase shift?Group of answer choicesDim lightDarknessBright light
Question
When using light as a zeitgeber, which of the following will cause a larger phase shift?Group of answer choicesDim lightDarknessBright light
Solution
Bright light will cause a larger phase shift when used as a zeitgeber. This is because bright light has a stronger influence on our circadian rhythms, which are the physical, mental, and behavioral changes that follow a daily cycle. They respond primarily to light and darkness in an organism's environment. The term "zeitgeber" is a German word that literally means "time giver." It refers to any external or environmental cue that entrains or synchronizes an organism's biological rhythms to the Earth's 24-hour light/dark cycle and 12-month year.
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