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Optics is the study of light, and its interaction with matter. It includes topics such as imaging systems, fiber optics, lasers, quantum optics, and more.

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The theoretical equation you are looking for is actually referred to as a model, which you must hypothesise based on sound reason. The exponential model is one that allows for a rate of change proport …
answered Oct 23 '13 by gregsan
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the parallel mirrors cannot be perfectly parallel. they only need to be aligned enough so that photons can bounce between them long enough for lasing to occur. in practice this is not easy, but using …
answered Oct 2 '13 by gregsan
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There is no one focal point. It is more like a focal axis. The whole longitudinal centre line of the cylinder are focal points. this means you can line up many diodes from top to bottom as long as the …
answered Mar 4 '14 by gregsan
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The primary rainbow is at 40.7-42.4 degrees, where ~42 degrees is the critical angle for red light to reflect back to the observer, and 40 degrees for blue light. what this means is that for a droplet …
answered Nov 28 '13 by gregsan
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in an F-P cavity such as this...the cavity thickness is quarter wavelength thick, such that 3-5 travels a distance of half a wavelength (180 degrees shift even before accounting for the phase shift du …
answered Sep 12 '13 by gregsan
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light of different frequencies travel at different speeds in matter. this leads to the light reaching the destination at different times. you need to obtain the refractive indices of red and blue ligh …
answered Oct 2 '13 by gregsan
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Two way mirrors are just very reflective windows. If both sides are equally bright, both sides can see the opposite side as clearly as their own reflection. If one side is much darker, then there is t …
answered Nov 6 '13 by gregsan
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due to the curvature of the earth, you can only see flat land for about 5km give or take a few hundred meters. from a sky object you are limited by the photon flux emitted or reflected by that object …
answered Sep 18 '13 by gregsan
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rules is paramount to properly understanding optics problems as they are posed. in this question the magnifcation is given as 4, whereas information on orientation is unknown.therefore the sign of $v …
answered Oct 8 '13 by gregsan
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Any unit involving solid angle (steradians) is usable but not helpful here since they are tailored to characterise radiation emitters, meanwhile you are just trying to measure received radiation some …
answered Nov 2 '16 by gregsan
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The cells in our retina that detect by frequency (read: colour) detect most strongly in three slightly different bands we know as Red, Green and Blue. To make a slight correction I would say an inca …
answered Apr 17 '14 by gregsan