universe - on AstroQuiz
... South Africa at this time we get lots of heat from the Sun because it passes nearly overhead at mid-day, and days are long. For the other six months from March through September, the southern hemisphere is tilted away from the Sun, the tilt being biggest in June, when we experience mid-winter. At th ...
... South Africa at this time we get lots of heat from the Sun because it passes nearly overhead at mid-day, and days are long. For the other six months from March through September, the southern hemisphere is tilted away from the Sun, the tilt being biggest in June, when we experience mid-winter. At th ...
08-Michelson
... Preliminary adjustments: Switch on the power supply for the sodium lamp with the current control in position 3. Adjust the current to approximately 0.9 A, but not exceeding this value. Place a small loop of wire to the right of the diffusing screen. Four images should be visible, two of which are mo ...
... Preliminary adjustments: Switch on the power supply for the sodium lamp with the current control in position 3. Adjust the current to approximately 0.9 A, but not exceeding this value. Place a small loop of wire to the right of the diffusing screen. Four images should be visible, two of which are mo ...
The Sun: the Solar Atmosphere, Nuclear Fusion
... Need large proton speed ( high temperature) to overcome Coulomb barrier (electrostatic repulsion between protons) T ≥ 107 0K = 10 million 0K ...
... Need large proton speed ( high temperature) to overcome Coulomb barrier (electrostatic repulsion between protons) T ≥ 107 0K = 10 million 0K ...
Ay123 Fall 2011 STELLAR STRUCTURE AND EVOLUTION Problem Set 4
... In this problem you will consider the opacity due to the negative hydrogen ion H− in stellar atmospheres. In cool stars, bound-free (photoionization) of this ion provides most of the opacity at wavelengths above the Balmer limit (λ = 3647 Å, below which opacity is due to photoionization of hydrogen ...
... In this problem you will consider the opacity due to the negative hydrogen ion H− in stellar atmospheres. In cool stars, bound-free (photoionization) of this ion provides most of the opacity at wavelengths above the Balmer limit (λ = 3647 Å, below which opacity is due to photoionization of hydrogen ...
Open Houses at the Campus Observatory Astronomical Horizons Lecture
... • Pressure is not greater at hotter temperature • Baseballs move because they are close together • Quantum mechanics: uncertainty relation • Speed × confinement = Planck’s constant • Pressure is greater if gas is confined to smaller region • In a smaller star, baseballs move faster • Baseballs hit w ...
... • Pressure is not greater at hotter temperature • Baseballs move because they are close together • Quantum mechanics: uncertainty relation • Speed × confinement = Planck’s constant • Pressure is greater if gas is confined to smaller region • In a smaller star, baseballs move faster • Baseballs hit w ...
slides introducing IR/Raman of proteins
... Spectral Regions and Transitions Magnetic Resonance—different course • Long wavelength radiowaves are of low energy that is sufficient to ‘flip’ the spin of nuclei in a magnetic field (NMR). Nuclei interact weakly so spectral transitions between single, well defined energy levels are very sharp and ...
... Spectral Regions and Transitions Magnetic Resonance—different course • Long wavelength radiowaves are of low energy that is sufficient to ‘flip’ the spin of nuclei in a magnetic field (NMR). Nuclei interact weakly so spectral transitions between single, well defined energy levels are very sharp and ...
Light Energy Demonstration
... The glowing of the phosporescent strip in the Demonstrator Card is due to two processes that occur in tandem. First, the phosphor must absorb light of the proper energy to excite an electron from its lowest energy ground state to a higher energy excited state. Once in the excited state, the electron ...
... The glowing of the phosporescent strip in the Demonstrator Card is due to two processes that occur in tandem. First, the phosphor must absorb light of the proper energy to excite an electron from its lowest energy ground state to a higher energy excited state. Once in the excited state, the electron ...
Microscopy
... Is the useful limit of magnification, it is the ability of microscope, at specific magnification to distinguish two separate objects situated close to one another and the ability of the lens to reveal fine details. The smaller the distance between the two specific objects that can be distinguished a ...
... Is the useful limit of magnification, it is the ability of microscope, at specific magnification to distinguish two separate objects situated close to one another and the ability of the lens to reveal fine details. The smaller the distance between the two specific objects that can be distinguished a ...
Optical Mineralogy: Introduction
... maximum illumination. Note that this is the opposite of regular interference discussed earlier, the reasons being that the two waves are vibrating in perpendicular directions, and that we still have to deal with an additional layer represented by the analyzer. When white light is used instead of mon ...
... maximum illumination. Note that this is the opposite of regular interference discussed earlier, the reasons being that the two waves are vibrating in perpendicular directions, and that we still have to deal with an additional layer represented by the analyzer. When white light is used instead of mon ...
A General Look at Feedback and Oscillations
... While the first condition would still allow many wave lengths, the second conditions normally admits just one. But why? Simply because any two mirrors at any distance define a resonant structure and that is why such a system is called a Fabry-Perot resonator (or interferometer). Only light with wave ...
... While the first condition would still allow many wave lengths, the second conditions normally admits just one. But why? Simply because any two mirrors at any distance define a resonant structure and that is why such a system is called a Fabry-Perot resonator (or interferometer). Only light with wave ...
Reading - Nature of Light
... In order to see something, light must enter your eye. A laser battle in a dark room would be completely black unless the laser light hit you in the eye. A laser beam is only seen when the light bounces from particles in the air to your eye. You can show this with a laser or flashlight by placing smo ...
... In order to see something, light must enter your eye. A laser battle in a dark room would be completely black unless the laser light hit you in the eye. A laser beam is only seen when the light bounces from particles in the air to your eye. You can show this with a laser or flashlight by placing smo ...
Document
... The results confirm the fundamental physical nature of the observed resonance structure which is caused by the internal vibration modes in macromolecules. Furthermore, experimental results may be combined with theoretical modeling to directly assign vibrational modes to specific structural featu ...
... The results confirm the fundamental physical nature of the observed resonance structure which is caused by the internal vibration modes in macromolecules. Furthermore, experimental results may be combined with theoretical modeling to directly assign vibrational modes to specific structural featu ...
Delineating the Evolution of Organic Molecular Synthesis
... The existence of dust in these clouds was essential both for augmenting the size of carbon-containing molecules through second order (or greater) reactions and for accretive processes leading to the formation of protosolar nebulae [4-6]. The gravitational collapse of an interstellar cloud has the po ...
... The existence of dust in these clouds was essential both for augmenting the size of carbon-containing molecules through second order (or greater) reactions and for accretive processes leading to the formation of protosolar nebulae [4-6]. The gravitational collapse of an interstellar cloud has the po ...
The Sagittarius dwarf irregular galaxy: Metallicity and stellar
... content in dwarf irregular galaxies (see Mateo 1998). Because of its high gas content, low luminosity, and especially its claimed very low metallicity, SagDIG may be a clue to the origin and evolution of dwarf galaxies. Although located at the border of the Local Group it is still close enough to al ...
... content in dwarf irregular galaxies (see Mateo 1998). Because of its high gas content, low luminosity, and especially its claimed very low metallicity, SagDIG may be a clue to the origin and evolution of dwarf galaxies. Although located at the border of the Local Group it is still close enough to al ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.