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4.8 Acceptance Angle and Numerical Aperture
4.8 Acceptance Angle and Numerical Aperture

... The fibre output is a cone of light that spreads out wider as the distance from the fibre exit increases. The grid slide or screen and ruler can be used to measure diameters. The edges of the cone of light may appear fuzzy so there will be an error introduced into your measurements. Measurement of t ...
Michael_Chau_Laeer_Telecomunication_Report
Michael_Chau_Laeer_Telecomunication_Report

... The concept of a laser involves the amplification of light into an intense ray consisting of photons. These particles have the same direction, frequency, and polarization as well as identical or a phased with a fixed differential with respect to other photons. Because of these attributes, the beam i ...
Review Article Nanostructures for Enhanced Light Absorption in
Review Article Nanostructures for Enhanced Light Absorption in

... An illustrative example of this enhanced absorption is the observation of photolysis of water-soluble components inside cloud droplets by ultraviolet/visible radiation [28]. A similar concept for achievement of light guiding is realized by placing a plasmonic metal structure on the backside of a thi ...
To understand the basics of reflection and refraction
To understand the basics of reflection and refraction

... hitting) • The % of light that gets reflected depends on the material it is hitting as well as the wavelength of light. ...
[pdf]
[pdf]

... kept on at all times. In this way we can associate a modulation power spectrum with each spatial location in the sample. By measuring the power spectrum of the reradiated light as a function of modulation frequency. we can determine the object ...
Mark scheme for Topic 11 - Cambridge Resources for the IB Diploma
Mark scheme for Topic 11 - Cambridge Resources for the IB Diploma

... The second polarizer is rotated until no light gets transmitted and the angle of rotation is measured. The concentration of the optically active solution is changed and the process is repeated to see the variation with concentration of the rotation angle. ...
8. Beam splitters
8. Beam splitters

... optical element. In order to get the normal deviation between transmitted and reflected beams the working angle of incidence should mainly be 45. The second surface of optical element is often coated with antireflection coating to avoid unwanted additional reflections. Such a divider can be applied ...
CONDUCTANCE FLUCTUATIONS IN MICROSTRUCTURES OF
CONDUCTANCE FLUCTUATIONS IN MICROSTRUCTURES OF

... macroscopic contacts the magnetoresistance exhibits smooth and pronounced Shubnikov-de Haas (SdH) oscillations. The deep minimum at B = 7 T is related to the quantum Hall effect in our 2D system. It should be noted that the SdH pattern in the magnetic fields B < 2 T has been found to be nearly the s ...
1 Hydrogen Spectrum/Rydberg Constant — In- troduction
1 Hydrogen Spectrum/Rydberg Constant — In- troduction

... should understand how it works. Light comes into the box via an optical fiber, and is dispersed by a grating onto a CCD array. The CCD array is controlled by a microprocesor, and the output connected to a computer by a USB connection. The device is powered through the USB connection. The software pr ...
Selective photodissociation of tailored molecular - Beilstein
Selective photodissociation of tailored molecular - Beilstein

Monomolecular Layers and Light
Monomolecular Layers and Light

... fluorescent dye and layers, it is reflected off the metal and propagates back on the same axis in the opposite direction. This reflected light then interferes with the original incoming light (the same case as the rope tied to an anchor) to form a standing wave ...
Course Syllabus
Course Syllabus

... that subject. The course outline reflects this concentration. The outline topics are not necessarily given in the order that they will be covered. The topic divides naturally into two parts, one part deals with subjects that are applications of the perturbation theory that you already know. The seco ...
Homework Set #6 Due: 3-28-14
Homework Set #6 Due: 3-28-14

... For short pulse work, we must also take into account the consequence of a range of wavelengths being present at the same time, as you can see from your answer to part (b). All of the above effects are minimized if N = 0! Such a waveplate is called a “zero-order waveplate”. They generally aren’t used ...
Phys 12 Investigating the Photoelectric Effect 1a) List three
Phys 12 Investigating the Photoelectric Effect 1a) List three

... same for both metals? No the wavelength (and frequency) is different for each metal. The frequency of the light seems to determine whether the photoelectric effect will occur for a certain metal. In wave theory, the frequency of the wave has no effect on the energy of the wave. (For example, 2 tunin ...
H2 Raman overtone intensities measured for
H2 Raman overtone intensities measured for

Enhancement of absorption and color contrast in
Enhancement of absorption and color contrast in

Chapter 25: Interference and Diffraction
Chapter 25: Interference and Diffraction

Light Measurement Handbook
Light Measurement Handbook

... ultraviolet radiation on human skin, which is used to determine UV hazard. The threshold limit value peaks at 270 nm, representing the most dangerous segment of the UV spectrum. The harmful effect at 270 nm is two times greater than at the 254 and 297 nm mercury lines, and 9000 times greater than at ...
Slide 1
Slide 1

if there is any current in the river
if there is any current in the river

... Arago concluded that our eyes must be sensitive to only a small range of velocities, that the faster and slower rays were invisible, but his colleague, Augustin-Jean Fresnel, came up with a different explanation: While aether flows frictionlessly through matter's molecular cracks, a tiny bit had bec ...
Solution chemistry and reaction mechanism taking place during the
Solution chemistry and reaction mechanism taking place during the

... chloro-hydroxo complexes and that this predominance depends on the acetic acid concentration and therefore on the solution pH. The hydrolysis reaction of the sulphide precursor is another point that should be considered when a CBD process is studied. In the case of the thioacetamide, the most recent ...
Polarization of Light Mica Sheet
Polarization of Light Mica Sheet

... sunlight. The sun’s light is not polarized, but when it reflects off of objects, especially water, the reflected light is preferentially polarized along one direction. Therefore, by looking at an angle 90 degrees from the direction of the sun, the sky is polarized because of the light that’s reflect ...
Tabletop nanometer extreme ultraviolet imaging in an
Tabletop nanometer extreme ultraviolet imaging in an

Group 2 - Index of
Group 2 - Index of

9. Microwaves MW
9. Microwaves MW

... and reflection of microwaves from different samples will be investigated. In the second, the set-up is arranged to become a Michelson interferometer for the determination of the wavelength of the source. Finally, the intensity distribution from diffraction in a single and a double slit is measured. ...
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Ultraviolet–visible spectroscopy



Ultraviolet–visible spectroscopy or ultraviolet-visible spectrophotometry (UV-Vis or UV/Vis) refers to absorption spectroscopy or reflectance spectroscopy in the ultraviolet-visible spectral region. This means it uses light in the visible and adjacent (near-UV and near-infrared [NIR]) ranges. The absorption or reflectance in the visible range directly affects the perceived color of the chemicals involved. In this region of the electromagnetic spectrum, molecules undergo electronic transitions. This technique is complementary to fluorescence spectroscopy, in that fluorescence deals with transitions from the excited state to the ground state, while absorption measures transitions from the ground state to the excited state.
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