light is the most significant environmental factor that influences the circadian rhythm.
Circadian rhythms are physical, mental, and behavioral changes that follow a 24-hour cycle. These natural processes respond primarily to light and dark and affect most living things, including animals, plants, and microbes. Chronobiology is the study of circadian rhythms.
There are four biological circadian rhythms firstly the 24-hour cycle that includes physiological and behavioral rhythms like sleeping. secondly diurnal rhythms the circadian rhythm synced with day and night, thirdly ultradian rhythms biological rhythms with a shorter period and higher frequency than circadian rhythms.
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