Light intensity information

measures of light are commonly known as intensity: Radiant intensity, a radiometric quantity measured in watts per steradian (W/sr) Luminous intensity, a photometric...

In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle...

whether light intensity affected the period of the circadian rhythm. To examine this, Aschoff and colleagues manipulated the intensity of light from outside...

'A' lamps (light bulbs) which are generally less costly than reflector lamps. Downlights can be incandescent, fluorescent, HID (high intensity discharge)...

if light intensity stays the same for the entire 24 hour period. In the past, biologists have used lux or energy meters to quantify light intensity. They...

pupillary light reflex (PLR) or photopupillary reflex is a reflex that controls the diameter of the pupil, in response to the intensity (luminance) of light that...

efficiency varies with the frequency of the light being converted, light intensity, temperature, and proportion of carbon dioxide in the atmosphere, and...

organism as a result of changes in light intensity. The alteration in speed is independent of the direction from which the light is shining. Photokinesis is...

frequency—regardless of the light's intensity or duration of exposure. Because a low-frequency beam at a high intensity does not build up the energy...

at a distance x from the light source, the light intensity received is proportional to 1/xn. None (n = 0) – The light intensity received is the same regardless...

intensity of lamps and the person's skin pigment and sensitivity. About 1% of the human population has vitiligo which causes painless distinct light-colored...

absorbance. Photodiodes are often used for accurate measurement of light intensity in science and industry. They generally have a more linear response...

correlation between light intensity and photosynthetic rate. It is a plot of photosynthetic rate as a function of light intensity (irradiance). The PI...

lights would indicate the difference in intensity (e.g. a light twice as far would be four times the intensity). Ritchie's photometer depends upon equal...

diffraction grating), a complex pattern of varying intensity can result. These effects also occur when a light wave travels through a medium with a varying...

astronomy, a light curve is a graph of the light intensity of a celestial object or region as a function of time, typically with the magnitude of light received...

emanating from a scene; that is, the intensity of light in a scene, and also the precise direction that the light rays are traveling in space. This contrasts...

called positive if the movement is in the direction of increasing light intensity and negative if the direction is opposite. Two types of positive phototaxis...

analyzed using the intensity or photon autocorrelation function (also known as photon correlation spectroscopy – PCS or quasi-elastic light scattering – QELS)...

thorax; while its sense of vision is in the compound eyes, the change in light intensity is perceived in the simple eyes (ocelli). At high population densities...

is a unit of measurement for luminous intensity. It expresses levels of light intensity relative to the light emitted by a candle of specific size and...

Exercise intensity refers to how much energy is expended when exercising. Perceived intensity varies with each person. It has been found that intensity has...

The light compensation point (Ic) is the light intensity on the light curve where the rate of photosynthesis exactly matches the rate of cellular respiration...

colour temperatures and spectral outputs from the grow light, as well as varying the intensity of the lamps. Depending on the type of plant being cultivated...

the object. Light intensity tends to dim with distance. For a point source of light, intensity decreases as distance increases. Intensity (I) is inversely...