- Видео 23
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Annette Dowd
Добавлен 25 фев 2016
Statistical Mechanics Revision
Revision of statistical physics for second year undergraduate students
Просмотров: 38
Видео
Optics Experiment 6 - Diffraction and Imaging
Просмотров 3434 года назад
Optics Experiment 6 - Diffraction and Imaging
Diffraction L06
Просмотров 1304 года назад
Week 6 lecture. Diffraction. Young's Experiment, Fresnel diffraction, zone pate, Fraunhofer diffraction, single slit, double slit, rectangular aperture, diffraction grating, grating spectrometer, spectral resolution, Fourier analysis.
Optics Experiment 5 - Building a Diffraction Grating Spectrometer
Просмотров 6064 года назад
Set-up for experiment 5. Diffraction gratings, gas emission spectra, calibration, spectral resolution.
Interference L05
Просмотров 1114 года назад
Week 5 lecture. Interference, intensity, phase difference, optical path length, interferometers, thin film interference, Michelson interferometer, Fabry-Perot interferometer, Newton's rings, Fizeau fringes
Optics Experiment 4 - Newton's Rings
Просмотров 4514 года назад
Setup for experiment 4. Newton's rings, interference, gas emission spectra, coherence length
Sources and detectors L04
Просмотров 1084 года назад
Week 4 lecture. Radiometry, photometry, spectra, black body radiation, luminescence, photodetectors, thermal detectors, photonic detectors, thermal noise, shot noise.
Apertures and aberrations L03
Просмотров 4264 года назад
Week 3 Lecture. Stops, field stop, aperture stop, entrance pupil, exit pupil, depth of field, depth of focus, spherical aberration, coma, astigmatism, sagittal, meridional, tangential, field curvature, distortion, chromatic aberration.
Optics Experiment 3 - Source characterisation
Просмотров 3844 года назад
Set up for experiment 3. LED, Laser diode, white light, spectroscopy, bandwidth, optical power, lasing threshold
Optics Experiment 2 - Apertures and Aberrations
Просмотров 8824 года назад
Setup for experiment 2. Aperture, intensity, spherical aberration, coma, chromatic aberration.
More Geometric Optics L02
Просмотров 1364 года назад
Thick lenses, lens combinations, mirrors, electron lenses. Principal planes, effective focal length, ray analysis matrix methods.
Optics Experiment 1 - Focal Length and Principal Planes
Просмотров 3514 года назад
Set-up for Experiment 1
Geometric optics L01
Просмотров 2084 года назад
Week 1 Geometric Optics lecture. Paraxial optics, refractive index, ray tracing, spherical surface, thin lenses
Ampere's Law Explainer video 4
Просмотров 336 лет назад
Worked example of Ampere's Law for finding the magnetic field about a solenoid
Thank you maam Helped me a to understand this concept for my advance exam Love from India
Nice video, thanks. What if the grating is on a 2mm thick glass substrate. How do you compensate for the refraction in the substrate.
Gratings in commercial spectrometers work in reflection mode to avoid this issue! You could model the refraction if you knew the dispersion of the glass but it may prove simpler to do it empirically using known emission lines.
The problem is if you will get the light out from the glass substrate or not, because of TIR inside the substrate.
That will of course depend on the angle of diffraction(wavelength, grating pitch). The gratings I am using diffract the light be small enough angles that the first few orders would still be transmitted albeit at slightly larger angles, only weaker higher orders would be lost to TIR. If you lose even your first order to TIR, you could try changing your angle of incidence.
Very helpful lecture. Great Job.
Thank you!
Great lecture - Well prepared and presented.
Many thanks!