Министерство высшего и среднего специального образования
... associated with the superposition of two surface waves, such as are produced by two pebbles falling into a pool of water. A careful observer will notice that in certain regions, where the crest of one wave arrives simultaneously with the trough of the other, the effects of the two waves almost cance ...
... associated with the superposition of two surface waves, such as are produced by two pebbles falling into a pool of water. A careful observer will notice that in certain regions, where the crest of one wave arrives simultaneously with the trough of the other, the effects of the two waves almost cance ...
Raman Spectroscopy - University of Arizona
... operates his mass spectrometer. He wanted to be able to zoom in on his graphs of the data points while the program was operational. He also wanted to be able to create graphs that contained fifteen to thirty-two thousand data points with out having to reformat the graph with each file, because the p ...
... operates his mass spectrometer. He wanted to be able to zoom in on his graphs of the data points while the program was operational. He also wanted to be able to create graphs that contained fifteen to thirty-two thousand data points with out having to reformat the graph with each file, because the p ...
PHYS 202 Notes, Week 10
... be exactly on the retina surface. Given that the retina is in a fixed location, the image distance, s0 is always fixed. In order to accommodate different object distances, s, the eye changes its effective focal length. It does that by contracting or relaxing a muscle called the ciliary muscle, which ...
... be exactly on the retina surface. Given that the retina is in a fixed location, the image distance, s0 is always fixed. In order to accommodate different object distances, s, the eye changes its effective focal length. It does that by contracting or relaxing a muscle called the ciliary muscle, which ...
Low-coherence heterodyne photon correlation spectroscopy
... autocorrelation decay rate as the single scattering regime is exceeded. Contributions from higher order scattering cause the characteristic intensity fluctuations to be more rapid and thus increase the intensity autocorrelation decay rate. This increased decay rate leads to an underestimate of the s ...
... autocorrelation decay rate as the single scattering regime is exceeded. Contributions from higher order scattering cause the characteristic intensity fluctuations to be more rapid and thus increase the intensity autocorrelation decay rate. This increased decay rate leads to an underestimate of the s ...
Vol. 26. Is. 5 - Society for Experimental Mechanics
... discussion so far has centered on the idea that we can measure the difference between two path lengths, and this, indeed, is one way that interferometry is used. But, there is another way that is even more useful. Suppose that we hold one of the paths constant and call it a reference path. Then, we ...
... discussion so far has centered on the idea that we can measure the difference between two path lengths, and this, indeed, is one way that interferometry is used. But, there is another way that is even more useful. Suppose that we hold one of the paths constant and call it a reference path. Then, we ...
System for measuring a radiation pattern of the light source
... The stepper motor has very small requirements for torque. It was decided to use NEMA 14 and NEMA 17, which are also used in 3D printers. In our application, a step angle value is a decisive factor. For this motor it is 1,8° per one step. It is possible to find stepper motors with smaller step, but i ...
... The stepper motor has very small requirements for torque. It was decided to use NEMA 14 and NEMA 17, which are also used in 3D printers. In our application, a step angle value is a decisive factor. For this motor it is 1,8° per one step. It is possible to find stepper motors with smaller step, but i ...
optical cavity
... and plotting g1 against g2 as shown. Areas bounded by the line g1 g2 = 1 and the axes are stable. Cavities at points exactly on the line are marginally stable; small variations in cavity length can cause the resonator to become unstable, and so lasers using these cavities are in practice often opera ...
... and plotting g1 against g2 as shown. Areas bounded by the line g1 g2 = 1 and the axes are stable. Cavities at points exactly on the line are marginally stable; small variations in cavity length can cause the resonator to become unstable, and so lasers using these cavities are in practice often opera ...
Interference effects Thin film interference Phase
... A rectangular loop of wire 20 cm square is dipped into a soap solution an then held vertically, producing a soap film whose thickness varies linearly from essentially zero at the top to 1.0μm at the bottom. If the film is illuminated with 650 nm light how many bright bands will appear? ...
... A rectangular loop of wire 20 cm square is dipped into a soap solution an then held vertically, producing a soap film whose thickness varies linearly from essentially zero at the top to 1.0μm at the bottom. If the film is illuminated with 650 nm light how many bright bands will appear? ...
Quantitative force measurements with optical tweezers: The JPK
... on the size of the trapped object. One speaks of the ‘rayoptics’ regime when the object’s dimension d is much larger than the wavelength of the trapping light: d>>λ. In this case, diffraction effects can be neglected and the trapping forces of the light can be understood in terms of ray optics. The ...
... on the size of the trapped object. One speaks of the ‘rayoptics’ regime when the object’s dimension d is much larger than the wavelength of the trapping light: d>>λ. In this case, diffraction effects can be neglected and the trapping forces of the light can be understood in terms of ray optics. The ...
Learning material
... that parallel rays from a point at infinity come to a focus is that non-parallel rays from the same point on an object cross at a single point to form an image. A bundle of these rays entering the eye are traced back to the image point. For a non-parabolic surface the rays all cross at different poi ...
... that parallel rays from a point at infinity come to a focus is that non-parallel rays from the same point on an object cross at a single point to form an image. A bundle of these rays entering the eye are traced back to the image point. For a non-parabolic surface the rays all cross at different poi ...
On Level FOCUS curriculum
... in straight lines, and had tops and bottoms. He believed these light waves could be long or short. In the 1800s, Thomas Young designed experiments that showed both the ancient Greeks and Huygens were right. Young shined light through two narrow slits in a piece of paper. The light coming through bot ...
... in straight lines, and had tops and bottoms. He believed these light waves could be long or short. In the 1800s, Thomas Young designed experiments that showed both the ancient Greeks and Huygens were right. Young shined light through two narrow slits in a piece of paper. The light coming through bot ...
Atmospheric optics
Atmospheric optics deals with how the unique optical properties of the Earth's atmosphere cause a wide range of spectacular optical phenomena. The blue color of the sky is a direct result of Rayleigh scattering which redirects higher frequency (blue) sunlight back into the field of view of the observer. Because blue light is scattered more easily than red light, the sun takes on a reddish hue when it is observed through a thick atmosphere, as during a sunrise or sunset. Additional particulate matter in the sky can scatter different colors at different angles creating colorful glowing skies at dusk and dawn. Scattering off of ice crystals and other particles in the atmosphere are responsible for halos, afterglows, coronas, rays of sunlight, and sun dogs. The variation in these kinds of phenomena is due to different particle sizes and geometries.Mirages are optical phenomena in which light rays are bent due to thermal variations in the refraction index of air, producing displaced or heavily distorted images of distant objects. Other optical phenomena associated with this include the Novaya Zemlya effect where the sun appears to rise earlier or set later than predicted with a distorted shape. A spectacular form of refraction occurs with a temperature inversion called the Fata Morgana where objects on the horizon or even beyond the horizon, such as islands, cliffs, ships or icebergs, appear elongated and elevated, like ""fairy tale castles"".Rainbows are the result of a combination of internal reflection and dispersive refraction of light in raindrops. Because rainbows are seen on the opposite side of the sky as the sun, rainbows are more prominent the closer the sun is to the horizon due to their greater distance apart.