Absorption of Light in Semiconductors 5.2.2 Absorption and Emission of Light
... 1. A large optical efficiency is not easy to achieve. Generally, much of the light produced will never leave the device. 2. The typical structures from Si integrated circuit technology may or may not be useful for optoelectronic applications. In general, we have to develop new approaches. 3. We alwa ...
... 1. A large optical efficiency is not easy to achieve. Generally, much of the light produced will never leave the device. 2. The typical structures from Si integrated circuit technology may or may not be useful for optoelectronic applications. In general, we have to develop new approaches. 3. We alwa ...
Grade 10 Optics Unit Outline
... 18. In the novel Lord of the Flies, a band of marooned boys use the eyeglasses of a nearsighted boy to focus light and start fires for warmth and cooking. However, diverging lenses are required to correct nearsightedness, and cannot be used to start fires. Sketch a converging and a diverging lens an ...
... 18. In the novel Lord of the Flies, a band of marooned boys use the eyeglasses of a nearsighted boy to focus light and start fires for warmth and cooking. However, diverging lenses are required to correct nearsightedness, and cannot be used to start fires. Sketch a converging and a diverging lens an ...
Refraction and Total Internal Reflection Worksheet
... A ray of light is shown passing through three consecutive layered materials. Observe the direction of bending at each boundary and rank the three materials (A, B and C) in order of increasing index of refraction. ...
... A ray of light is shown passing through three consecutive layered materials. Observe the direction of bending at each boundary and rank the three materials (A, B and C) in order of increasing index of refraction. ...
Daylighting
Daylighting is the practice of placing windows or other openings and reflective surfaces so that during the day natural light provides effective internal lighting. Particular attention is given to daylighting while designing a building when the aim is to maximize visual comfort or to reduce energy use. Energy savings can be achieved from the reduced use of artificial (electric) lighting or from passive solar heating or cooling. Artificial lighting energy use can be reduced by simply installing fewer electric lights because daylight is present, or by dimming/switching electric lights automatically in response to the presence of daylight, a process known as daylight harvesting.Daylighting is a technical term given to a common centuries-old, geography and culture independent design basic when ""rediscovered"" by 20th century architects. The amount of daylight received in an internal space can be analyzed by undertaking a daylight factor calculation. Today, the use of computers and proprietary industry software, such as Radiance, can allow an architect or engineer to quickly undertake complex calculations to review the benefit of a particular design.There is no direct sunlight on the polar-side wall of a building from the autumnal equinox to the spring equinox. Traditionally, houses were designed with minimal windows on the polar side but more and larger windows on the equatorial-side. Equatorial-side windows receive at least some direct sunlight on any sunny day of the year (except in tropical latitudes in summertime) so they are effective at daylighting areas of the house adjacent to the windows. Even so, during mid-winter, light incidence is highly directional and casts deep shadows. This may be partially ameliorated through light diffusion, light pipes or tubes, and through somewhat reflective internal surfaces. In fairly low latitudes in summertime, windows that face east and west and sometimes those that face toward the pole receive more sunlight than windows facing toward the equator.