In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd), an SI base unit. (Wikipedia).
Astronomy - Ch. 17: The Nature of Stars (10 of 37) Relationship Between Intensity and Luminosity
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the relationship between intensity and luminosity. Next video can be seen at: http://youtu.be/hhj0mhvLLiY
From playlist ASTRONOMY 17 STARS AND THE H-R DIAGRAM
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
Teach Astronomy - Apparent Brightness
http://www.teachastronomy.com/ Apparent Brightness in astronomy is the number of photons per second collected at the Earth from an astronomical source. It depends on three things: First, the collecting area of the device used to observe the source of light. In the case of a telescope, t
From playlist 14. Stars
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
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
Christmas Special: Analog TV Equipment (R&S SFM test transmitter and CCVS video generator)
This video is a bit different from my previous videos and not related to optics. I made it purely out of interest for older (analog) equipment and technology. The video discusses the principles behind analog TV transmission technology, such as color encoding in composite video signals and
From playlist electronics
LEDs - Light Emitting Diodes - Basic Introduction
This electronics video tutorial provides a basic introduction into LEDs also known as light emitting diodes. It discusses the polarity of an LED including how to connect them. The anode is the positive terminal and the cathode is the negative terminal. It discusses topics such as the fo
From playlist Electronic Circuits
Marc Levoy - Lectures on Digital Photography - Lecture 15 (16may16).mp4
This is one of 18 videos representing lectures on digital photography, from a version of my Stanford course CS 178 that was recorded at Google in Spring 2016. A web site that includes all 18 videos, my slides, and the course schedule, applets, and assignments is http://sites.google.com/sit
From playlist Stanford: Digital Photography with Marc Levoy | CosmoLearning Computer Science
Physics - Mechanics: Sound and Sound Waves (7 of 47) Sound Intensity
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the basics of the intensity of sound (speaking, whisper, and screaming!).
From playlist MOST POPULAR VIDEOS
Physics 50 E&M Radiation (20 of 33) Plane E&M Waves and Power, Intensity
Visit http://ilectureonline.com for more math and science lectures! In this video I will discuss the relationship between intensity and power and find the number of photons entering the eye per second from Alpha Centari. Next video in series: http://youtu.be/Tz6OF5HhshU
From playlist PHYSICS 50 ELECTROMAGNETIC RADIATION
How to Prepare for the JEE (Physics) and Other Physics Tests (3 of TBD) Standard Units & Conversions
Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 We will go over standard units and conversions that’s helpful to memorize: Capacitance, magnetic flux, inductance, magnetic flux dens
From playlist HOW TO PREPARE FOR THE JEE AND OTHER TESTS
This video shows a barely successful attempt at displaying video in a standard Windows command prompt. Converting pixel RGB values into characters with a limited palette and looking good has proven challenging. In fact, I'm not that happy with the end result, so this is a bit of a work in
From playlist Interesting Programming
Marc Levoy - Lectures on Digital Photography - Lecture 17 (23May16).mp4
This is one of 18 videos representing lectures on digital photography, from a version of my Stanford course CS 178 that was recorded at Google in Spring 2016. A web site that includes all 18 videos, my slides, and the course schedule, applets, and assignments is http://sites.google.com/sit
From playlist Stanford: Digital Photography with Marc Levoy | CosmoLearning Computer Science
In this Halloween special, we look at an effect I wrote that makes videos games look like ink drawings for Inktober. Twitter: https://twitter.com/Acerola_t Twitch: https://www.twitch.tv/acerola_t Discord: https://discord.gg/FxGQvbfm6Y Code: https://github.com/GarrettGunnell/Inktober-Ink-S
From playlist Main Series
Astronomy - Ch. 17: The Nature of Stars (11 of 37) Difference Between Luminosity and Brightness
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the difference between luminosity and brightness. Next video can be seen at: http://youtu.be/hGOKfqmEHOs
From playlist ASTRONOMY 17 STARS AND THE H-R DIAGRAM
Lecture 15: Radiometry (CMU 15-462/662)
Full playlist: https://www.youtube.com/playlist?list=PL9_jI1bdZmz2emSh0UQ5iOdT2xRHFHL7E Course information: http://15462.courses.cs.cmu.edu/
From playlist Computer Graphics (CMU 15-462/662)
The Observational Quest for the Earliest Galaxies: Progress and Challenges - Richard Ellis
The Observational Quest for the Earliest Galaxies: Progress and Challenges - Richard Ellis http://www.sns.ias.edu/~seminar/colloquia.shtml More videos on http://video.ias.edu
From playlist Natural Sciences
Teach Astronomy - Absolute Brightness
http://www.teachastronomy.com/ Apparent brightness does not express a star or other source of light's true energy output. Astronomers are more interested in absolute brightness or equivalently absolute magnitude or luminosity. For example, we can consider a situation where the apparent b
From playlist 14. Stars