Teach Astronomy - Cosmic Mass to Light Ratio
http://www.teachastronomy.com/ Another way to look at the mass density of the universe is in terms of the cosmic mass to light ratio. Mass to light ratio is defined as the ratio of the mass, in solar units, to the luminosity, in solar units, so for the Sun by definition M over L is one.
From playlist 23. The Big Bang, Inflation, and General Cosmology 2
Candela, lumen and lux - Measuring light: from fizzics.org
Measuring light can be of the strength of the source or the intensity of the light at some point. There are three units within the SI system used to make measurements. The video explains the definition and meaning of these different measurements of luminous intensity, luminous flux and ill
From playlist Light, lenses and mirrors
Physics - Optics: Single Slit Diffraction (8 of 15) Intensity=? General Case
Visit http://ilectureonline.com for more math and science lectures! In this video I will calculates the intensity (anywhere) in general caused by the diffraction. Next video in series: http://youtu.be/PpYCIyKJAWM
From playlist PHYSICS 61 DIFFRACTION OF LIGHT
Refraction (1 of 5) What is Refraction? An Explanation
Refraction, A conceptual qualitative explanation. Refraction is the change in direction of a ray of light as it passes from one medium to another. The amount of refraction is determined by the index of refraction of the media and the angle of incidence. For light, refraction follows Snell
From playlist Optics: Ray Diagrams, Reflection, Refraction, Thin Lens Equation
Astronomy - Ch. 5: Light & E&M Radiation (6 of 30) Difference of E&M Frequence
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the different frequencies of electromagnetic radiation.
From playlist ASTRONOMY 5 LIGHT AND RADIATION
HIGH POWERED LED 2 WATT x 3 in series 6 WATTS Efficient Green Lighting
http://www.greenpowerscience.com/HOTLINKS.php This High Powered LED Light Emitting Diode Series produces the same pure white light as a 90 Watt Halogen Bulb with a total of less than 6 watt power consumption. This lighting requires an AC to DC converter and LED DRIVER for the LED LIGHTS
From playlist LED Light Emitting Diode
Teach Astronomy - The Magnitude Scale
http://www.teachastronomy.com/ The magnitude scale is defined in such a way as a magnitude difference of five magnitudes corresponds to a factor of a hundred in apparent brightness. Two and a half magnitude difference corresponds to a factor of 10 in apparent brightness. Lower numbers in
From playlist 14. Stars
Astronomy - Ch. 17: The Nature of Stars (14 of 37) Apparent Magnitude: Another Look
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is apparent magnitude. Next video can be seen at: http://youtu.be/-4FYvEx7jyw
From playlist ASTRONOMY 17 STARS AND THE H-R DIAGRAM
Astronomy - Ch. 17: The Nature of Stars (18 of 37) UBV Photometry: Star Brightnessr and it's Color
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain UBV photometry (measuring brightness of star by its color). Next video can be seen at: http://youtu.be/FmyxzCd2pgU
From playlist ASTRONOMY 17 STARS AND THE H-R DIAGRAM
http://www.teachastronomy.com/ The mass to light ratio of a galaxy is a good way of characterizing its mean age. We can see this with examples from individual stars. A star a hundred times the mass of the Sun, a short-lived, hot, luminous, blue star, has a mass to light ratio of ten to t
From playlist 19. Galaxies 2
Physics 59 Optical Instruments (2 of 20) The Telescope
Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 In this video I will have a discussion on the how the telescope works and show you how to find its magnification. Previous video in
From playlist PHYSICS - OPTICS
Particle Physics (29 of 41) What is a Photon? 13. Mie Scattering
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain Mie scattering of photons scattering off large particles. Next video in the Particle Physics series can be seen at: http://youtu.be/4Lyf2zBSlCo
From playlist PHYSICS 65 PARTICLE PHYSICS
Ruby not Red: Color Theory for the Rest of Us by Louisa Barrett
This talk will be broken into 5 sections: 1) What is Color Blindness? Explain common types of color blindness. This is to increase audience understanding and empathy, as well as provide context as to why this is something we need to be conscious of and work to improve our efforts to addres
From playlist Madison+ Ruby 2018
The mushroom's shape does not matter in Penrose's unilluminable room
A while back, Steve Mould contacted me to ask for permission to use excerpts of some of my videos on Penrose unilluminable rooms, in his video published here: https://youtu.be/x3VluzZTReE . He then came back with a question: is the precise shape of the "mushrooms" important for the Penrose
From playlist Illumination problem
Mass to Light Ratio - Sixty Symbols
It's a funny symbol that looks like a seagull - but it helps astronomers learn what galaxies are made of. More at http://www.sixtysymbols.com/ Featuring Mike Merrifield.
From playlist Mike Merrifield - Sixty Symbols
An Archaeological Road Trip with the Keck Telescopes - Evan Kirby - 3/7/13
Produced in association with Caltech Academic Media Technologies. © 2013 California Institute of Technology
From playlist 20th Anniversary of W. M. Keck Observatory - 3/7/2013
Laws of Refraction of Light | Don't Memorise
Are the laws of Refraction of Light different from the laws of Reflection of Light? Watch this video to know more! ✅Download the Infinity Learn APP Now➡️ https://vsbpz.app.link/dmil ✅To access all videos related to Reflection and Refraction, enroll in our full course now: https://infi
From playlist Reflection and Refraction Class 10
Particle Physics (31 of 41) What is a Photon? 15. Mie Scattering - Radar Cross Section
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the graph of the principle of Mie scattering of particles the size of 1/10 of a wavelength to 1 wavelength. Next video in the Particle Physics series can be seen at: http://youtu.be/mvFp20Bpz
From playlist PHYSICS 65 PARTICLE PHYSICS
Light and Optics 8_1 Diffraction and Resolving Power
Diffraction and resolving power.
From playlist Physics - Light and Optics