kolynos - Look and Learn
... known stars were known as the Pointers. proposals were made. The present Rural Much, has been learned recently about District Councillors are elected for the Polaris that has made it of great interest, ordinary humdrum purposes and arc for it has been discovered, after some not suitable for Country ...
... known stars were known as the Pointers. proposals were made. The present Rural Much, has been learned recently about District Councillors are elected for the Polaris that has made it of great interest, ordinary humdrum purposes and arc for it has been discovered, after some not suitable for Country ...
700 nm 400 nm Wavelength, λ Frequency, f 4x1014 Hz
... edges of openings or slits. The diffraction effect is greatest when the slit width is on the order of the wavelength of light that is being diffracted. In Young’s double-slit experiment, light emerging from the two slits is used as two coherent sources. When the light is projected onto a screen, an ...
... edges of openings or slits. The diffraction effect is greatest when the slit width is on the order of the wavelength of light that is being diffracted. In Young’s double-slit experiment, light emerging from the two slits is used as two coherent sources. When the light is projected onto a screen, an ...
Lecture notes 8
... Nearly all the calcium atoms can produce Ca II K emission. There are 500,000 H atoms for every Ca atom. But only a small fraction (5 x 10-9) of these H atoms are neutral and in the first excited state (most in ground state). 500,000 x (5 x 10-9) = 1 / 400. Approximately 400 times more Ca II ions to ...
... Nearly all the calcium atoms can produce Ca II K emission. There are 500,000 H atoms for every Ca atom. But only a small fraction (5 x 10-9) of these H atoms are neutral and in the first excited state (most in ground state). 500,000 x (5 x 10-9) = 1 / 400. Approximately 400 times more Ca II ions to ...
File
... is 180° out of phase with the incident pulse. If these two pulses were to meet they would momentarily cancel as they passed one another. This happens whenever light waves are reflected from a material with a higher refractive index. If the waves are reflected from a lower refractive index material t ...
... is 180° out of phase with the incident pulse. If these two pulses were to meet they would momentarily cancel as they passed one another. This happens whenever light waves are reflected from a material with a higher refractive index. If the waves are reflected from a lower refractive index material t ...
Light - Effingham County Schools
... materials transmit almost all the light striking them, so you can see objects clearly through them. Only a small amount of light is absorbed and reflected. ...
... materials transmit almost all the light striking them, so you can see objects clearly through them. Only a small amount of light is absorbed and reflected. ...
1.1 Interaction of Light and Matter 1.2 Wavelike
... Classical physics: atoms can absorb and emit radiation (light) of any energy – “anything goes” Modern (quantum) physics: atoms can absorb or emit only radiation (light) of certain frequencies (quantized) Climbing devices analogy Classical rope ...
... Classical physics: atoms can absorb and emit radiation (light) of any energy – “anything goes” Modern (quantum) physics: atoms can absorb or emit only radiation (light) of certain frequencies (quantized) Climbing devices analogy Classical rope ...
AN INTRODUCTION TO THE STARS AND CONSTELLATIONS
... small, portable star wheel locator, the celestial globe with stellar objects distributed across the surface of a sphere, and the flat star map that is often published in astronomy magazines or mounted on the walls of classrooms. But there is also available astronomy software for the computer that ca ...
... small, portable star wheel locator, the celestial globe with stellar objects distributed across the surface of a sphere, and the flat star map that is often published in astronomy magazines or mounted on the walls of classrooms. But there is also available astronomy software for the computer that ca ...
The Sun (Nearest Star to us)
... sunspot is of the order of 4250K as compared to surrounding of 5700 K. It has a inside dark part known as umbra and outside ...
... sunspot is of the order of 4250K as compared to surrounding of 5700 K. It has a inside dark part known as umbra and outside ...
Measuring Stars
... The Hertzsprung–Russell Diagram Once many stars are plotted on an H–R diagram, a pattern begins to form: These are the 80 closest stars to us The darkened curve is called the main sequence, as this is where most stars are. Also indicated is the white dwarf region; these stars are hot but not very l ...
... The Hertzsprung–Russell Diagram Once many stars are plotted on an H–R diagram, a pattern begins to form: These are the 80 closest stars to us The darkened curve is called the main sequence, as this is where most stars are. Also indicated is the white dwarf region; these stars are hot but not very l ...
Supplementary Discussion - Word file
... -Oph 102 is measured, can be summarised as follows: 1. A simple script based on the IRAF task splot is used to determine the position of the continuum emission at different wavelengths. The Image Reduction and Analysis Facility (IRAF) is written and supported by the IRAF programming group at Nation ...
... -Oph 102 is measured, can be summarised as follows: 1. A simple script based on the IRAF task splot is used to determine the position of the continuum emission at different wavelengths. The Image Reduction and Analysis Facility (IRAF) is written and supported by the IRAF programming group at Nation ...
The Evolutionary Status of Be Stars in Clusters and in the Galactic
... present lower luminosity and gravity, and then be a low luminosity class III star. Both the spectral luminosity class and the position in the HR diagram for a fast rotator are likely to be more dependent on the inclination angle than on the evolutionary status. The above qualitative explanation simp ...
... present lower luminosity and gravity, and then be a low luminosity class III star. Both the spectral luminosity class and the position in the HR diagram for a fast rotator are likely to be more dependent on the inclination angle than on the evolutionary status. The above qualitative explanation simp ...
HR Diagram of a Star Cluster
... 5. Age of the Cluster We will assume that all the stars in NGC 6819 formed at the same time. The more massive stars are at the hot end of the Main Sequence. They consume their nuclear fuel quickly and are the first to evolve into red giants. As a cluster ages, the Main Sequence gets shorter at the h ...
... 5. Age of the Cluster We will assume that all the stars in NGC 6819 formed at the same time. The more massive stars are at the hot end of the Main Sequence. They consume their nuclear fuel quickly and are the first to evolve into red giants. As a cluster ages, the Main Sequence gets shorter at the h ...
Section 7 The Big Bang Theory
... There are three current scenarios that predict the future of the universe. If the universe is closed, gravity will catch up with the expansion and the universe will eventually be pulled back into a single point. This model suggests an endless series of big bangs and ‘big crunches’. An open universe ...
... There are three current scenarios that predict the future of the universe. If the universe is closed, gravity will catch up with the expansion and the universe will eventually be pulled back into a single point. This model suggests an endless series of big bangs and ‘big crunches’. An open universe ...
A540 Review - Chapters 1, 5-10
... Pe is the electron pressure and I is the ionization potential in ev. Again, u0 and u1 are the partition functions for the ground and first excited states. Note that the amount of ionization depends inversely on the electron pressure – the more loose electrons there are, the less ionization there wil ...
... Pe is the electron pressure and I is the ionization potential in ev. Again, u0 and u1 are the partition functions for the ground and first excited states. Note that the amount of ionization depends inversely on the electron pressure – the more loose electrons there are, the less ionization there wil ...
lecture21
... A mass which is contained within a radius smaller than that from which light – or anything else - can escape is a BLACK HOLE (BH). How big is the ball of matter within the black hole and how is it configured? Those are rather meaningless questions, since nothing can emerge from the BH, so we can ne ...
... A mass which is contained within a radius smaller than that from which light – or anything else - can escape is a BLACK HOLE (BH). How big is the ball of matter within the black hole and how is it configured? Those are rather meaningless questions, since nothing can emerge from the BH, so we can ne ...
pdf - Starchitect
... it will be unable to form, and a ring system will result. This minimum distance is called the “Roche Limit”: a little research can demonstrate that Saturn’s rings are inside its Roche Limit. Terrestrial planets come next: these can support life, but only if they’re placed in the star’s habitable zon ...
... it will be unable to form, and a ring system will result. This minimum distance is called the “Roche Limit”: a little research can demonstrate that Saturn’s rings are inside its Roche Limit. Terrestrial planets come next: these can support life, but only if they’re placed in the star’s habitable zon ...
Reflection and Refraction
... n1 sin qc = n2 sin 90 qc = sin-1 (n2/n1) This is the case of total internal reflection, where no light escapes the first medium ...
... n1 sin qc = n2 sin 90 qc = sin-1 (n2/n1) This is the case of total internal reflection, where no light escapes the first medium ...
Document
... New breakthrough is expected after the launch of GLAST. Several sources have been detected in the TeV range by ground-based gamma-ray telescopes. All of them, except M87, are BL Lacs at z<0.2 (more percisely, to high-frequency-peaked BL Lac – HBL). ...
... New breakthrough is expected after the launch of GLAST. Several sources have been detected in the TeV range by ground-based gamma-ray telescopes. All of them, except M87, are BL Lacs at z<0.2 (more percisely, to high-frequency-peaked BL Lac – HBL). ...
Lecture19
... arcminutes. The expansion velocity is measured from the Doppler shift to be 1450 km/s. Estimate the age of the nebula. How bright would the supernova that gave rise to the Crab nebula have been? ...
... arcminutes. The expansion velocity is measured from the Doppler shift to be 1450 km/s. Estimate the age of the nebula. How bright would the supernova that gave rise to the Crab nebula have been? ...
TIRSPEC Users Manual Introduction TIFR Near Infrared Spectrometer and Imager
... Figure 1: shows the expected exposure time required for 10 sigma continuum S/N of a star of given ...
... Figure 1: shows the expected exposure time required for 10 sigma continuum S/N of a star of given ...
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.