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The human eye can function from very dark to very bright levels of light; its sensing capabilities reach across nine orders of magnitude. This means that the brightest and the darkest light signal that the eye can sense are a factor of roughly 1,000,000,000 apart. However, in any given moment of time, the eye can only sense a contrast ratio of ...
A glass of 100% orange juice is considered one serving of fruit It’s a common misconception that orange juice is packed with sugar, but an 8-ounce glass of 100% OJ that is made from just oranges ...
It can be seen by shining the beam of a small bright light through the pupil from the periphery of a subject's vision. This results in an image of the light being focused on the periphery of the retina. Light from this spot then casts shadows of the blood vessels (which lie on top of the retina) onto unadapted portions of the retina.
Most red light gets absorbed by the shade-intolerant canopy plants, but more of the far-red light penetrates the canopy, reaching the understorey. The shade-tolerant plants found here are capable of photosynthesis using light at such wavelengths. [citation needed] The situation with respect to nutrients is often different in shade and sun.
Many soft drinks actually contain less caffeine than a cup of coffee, but more sugar, meaning you actually won't be as energized but instead, can increase your chances of weight gain. Click ...
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Light to the eyes, primarily blue-wavelength light, is important for the entrainment and maintenance of robust circadian rhythms. Exposure to sunlight in the morning is particularly effective; it leads to earlier melatonin onset in the evening and makes it easier to fall asleep. Natural daylight exposure, particularly at high intensities, has ...
In a pilot study, the implant – made from collagen protein from the animal – restored vision to 20 people with diseased corneas, most of whom were blind prior to receiving the implant.