Unit C POS Checklist
... The following is a list of ideas and concepts you need to know to be able to pass the Unit C test. They are taken from the Alberta Learning Program of Studies. Check off each idea as you study it at home. General Outcome 1: explain the nature and behaviour of EMR, using the wave model. Knowledge Out ...
... The following is a list of ideas and concepts you need to know to be able to pass the Unit C test. They are taken from the Alberta Learning Program of Studies. Check off each idea as you study it at home. General Outcome 1: explain the nature and behaviour of EMR, using the wave model. Knowledge Out ...
Lasers versus LEDs for Bioinstrumentation Laser Advantage #1
... applications the illumination area is very small as outlined in the above table. The ability to collect and focus light from an extended source into a finite target area is defined by the size of the emitting surface area and the solid angle into which it radiates in a property called etendue. The i ...
... applications the illumination area is very small as outlined in the above table. The ability to collect and focus light from an extended source into a finite target area is defined by the size of the emitting surface area and the solid angle into which it radiates in a property called etendue. The i ...
lecture 2
... With age, the lens becomes less flexible and accommodation becomes fixed at some distance. This fixing of the focal length of the lens is called PRESBYOPIA. The refracting power of the eye may not be the same in all dimensions. This is called ASTIGMATISM. ...
... With age, the lens becomes less flexible and accommodation becomes fixed at some distance. This fixing of the focal length of the lens is called PRESBYOPIA. The refracting power of the eye may not be the same in all dimensions. This is called ASTIGMATISM. ...
9-26 Geometrical Optics
... R Thus a mirror is like a lens with a focal length of f=R/ 2. The sign convention is as follows R>0 if the center of curvature comes before the surface (i.e. if the mirror is concave as seen by the source) so>0 and si>0 if they are on the same side of the mirror ...
... R Thus a mirror is like a lens with a focal length of f=R/ 2. The sign convention is as follows R>0 if the center of curvature comes before the surface (i.e. if the mirror is concave as seen by the source) so>0 and si>0 if they are on the same side of the mirror ...
Lasers and lenses - University of Toronto
... Resolution A standard for determining the resolution of an optical system is the Rayleigh criterion, which states that two objects are just resolved when the bright central maximum of the diffraction pattern from one object coincides with the first minimum of the diffraction pattern from the second ...
... Resolution A standard for determining the resolution of an optical system is the Rayleigh criterion, which states that two objects are just resolved when the bright central maximum of the diffraction pattern from one object coincides with the first minimum of the diffraction pattern from the second ...
observing sunspots using a pinhole camera
... solar image being projected parallel to the ground from the cold outdoors into the warm observatory. This, however, did not appear to degrade the image in any great detail. The intensity of the 24 cm solar image was easily bright enough for viewing and a larger pinhole could have been chosen, at lea ...
... solar image being projected parallel to the ground from the cold outdoors into the warm observatory. This, however, did not appear to degrade the image in any great detail. The intensity of the 24 cm solar image was easily bright enough for viewing and a larger pinhole could have been chosen, at lea ...
IQSE Banner News Page
... Spotlight summary: What is bb? As light propagates through the ocean, it experiences an exponential attenuation due to absorption and scattering. The backscattering coefficient bb is that component of the total scattering coefficient at angles greater than 90°. This is important because light that i ...
... Spotlight summary: What is bb? As light propagates through the ocean, it experiences an exponential attenuation due to absorption and scattering. The backscattering coefficient bb is that component of the total scattering coefficient at angles greater than 90°. This is important because light that i ...
Airy disk
In optics, the Airy disk (or Airy disc) and Airy pattern are descriptions of the best focused spot of light that a perfect lens with a circular aperture can make, limited by the diffraction of light. The Airy disk is of importance in physics, optics, and astronomy.The diffraction pattern resulting from a uniformly-illuminated circular aperture has a bright region in the center, known as the Airy disk which together with the series of concentric bright rings around is called the Airy pattern. Both are named after George Biddell Airy. The disk and rings phenomenon had been known prior to Airy; John Herschel described the appearance of a bright star seen through a telescope under high magnification for an 1828 article on light for the Encyclopedia Metropolitana:...the star is then seen (in favourable circumstances of tranquil atmosphere, uniform temperature, &c.) as a perfectly round, well-defined planetary disc, surrounded by two, three, or more alternately dark and bright rings, which, if examined attentively, are seen to be slightly coloured at their borders. They succeed each other nearly at equal intervals round the central disc....However, Airy wrote the first full theoretical treatment explaining the phenomenon (his 1835 ""On the Diffraction of an Object-glass with Circular Aperture"").Mathematically, the diffraction pattern is characterized by the wavelength of light illuminating the circular aperture, and the aperture's size. The appearance of the diffraction pattern is additionally characterized by the sensitivity of the eye or other detector used to observe the pattern.The most important application of this concept is in cameras and telescopes. Owing to diffraction, the smallest point to which a lens or mirror can focus a beam of light is the size of the Airy disk. Even if one were able to make a perfect lens, there is still a limit to the resolution of an image created by this lens. An optical system in which the resolution is no longer limited by imperfections in the lenses but only by diffraction is said to be diffraction limited.