Finally, since the eye must focus incident light on the retina, the brightness (radiance) of a source plays an important role in determining the degree of hazard of a light source. Diffusing the light source can greatly reduce the risk of injury....
Specimens of the isopod Saduria entomon were caught during late winter nights in Finland and divided into three groups: one was not at all exposed to any light and served as the control; a second was exposed to midday sunlight of 9.1×10^qu/m^2s for 30min; the third was exposed to art...
The International Commission on Illumination (CIE) has been published the overall sensitivity of the average human eye as a function of wavelength as V(λ), a function which is peaking at 555 nm (CIE, 2005). The SI unit of light intensity, the candela, is only defined at this specific ...
People with a certain eye disorder are virtually unable to see in moderately bright light, which seems to them unbearably intense, since the cells of their retinas are overwhelmed by moderately bright light. These people do, however, show normal se
aLight to stabilize If the light is bright enough, but it is constantly flashing and light is not stable enough, we say there is no stroboscopic. When the strobe exceeds a certain range, it will produce visual fatigue. And long-term visual fatigue will damage the human visual system. 点燃...
if the LED headlight glare issue is dangerous for drivers or not. According toAAA, the LED headlights that are on most cars today are not brighter than the older ones, the issue is that they give off a blueish-white light and that type of light is more irritating to the human eye. ...
I ndividuals experiencing early morning awakening insomnia have no diffi-culty initiating sleep but their predominant difficulty is waking before intended and not being able to resume sleep. These individuals may have an advanced or early timed circadian rhythm. Bright light therapy in the evening ...
if the LED headlight glare issue is dangerous for drivers or not. According toAAA, the LED headlights that are on most cars today are not brighter than the older ones, the issue is that they give off a blueish-white light and that type of light is more irritating to the human eye. ...
Bedazzling (眼花缭乱) with their bright colors and eye-catching displays fireworks light up our night skies during the holidays. However these crowd-pleasers can have some damaging side effects. Once a firework is set off it only takes a couple of seconds before smoke dust and harmful chemicals...
Dark-field microscopy overcomes these problems by preventing direct light from entering the front of the objective and the only light gathered is that reflected or diffracted by structures within the specimen (Fig. 3.14). This causes the specimen to appear as a bright image on a dark background...