In antenna theory, radiation efficiency is a measure of how well a radio antenna converts the radio-frequency power accepted at its terminals into radiated power. Likewise, in a receiving antenna it describes the proportion of the radio wave's power intercepted by the antenna which is actually delivered as an electrical signal. It is not to be confused with antenna efficiency, which applies to aperture antennas such as a parabolic reflector or phased array, or antenna/aperture illumination efficiency, which relates the maximum directivity of an antenna/aperture to its standard directivity. (Wikipedia).
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
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
Physics 50 E&M Radiation (31 of 33) Laser Light Example
Visit http://ilectureonline.com for more math and science lectures! In this video I will calculate the intensity and energy intensity of a laser light of power = 0.5mV, wavelength = 633nm, and diameter = 1mm.
From playlist PHYSICS 50 ELECTROMAGNETIC RADIATION
Physics 50 E&M Radiation (2 of 33) Frequency and Wavelength
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain electromagnetic radiation in terms of frequency and wavelength. Next video in series: http://youtu.be/t6EnTtkG4hA
From playlist PHYSICS 50 ELECTROMAGNETIC RADIATION
Astronomy - Ch. 5: Light & E&M Radiation (13 of 30) Different Energies of E&M Radiations
Visit http://ilectureonline.com for more math and science lectures! In this video I will discuss the different energies of photons.
From playlist ASTRONOMY 5 LIGHT AND RADIATION
Astronomy - Ch. 5: Light & E&M Radiation (16 of 30) Radiation Curves of Stars and Humans
Visit http://ilectureonline.com for more math and science lectures! In this video I will compare the radiation curves of different stars and a person.
From playlist ASTRONOMY 5 LIGHT AND RADIATION
Physics 50 E&M Radiation (4 of 33) Frequency of E&M Radiation and Temperature
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the relationship of an object (and it's temperature) and the kinds of E&M radiation emitted from the object. Next video in series: http://youtu.be/SCMK0UJH1p4
From playlist PHYSICS 50 ELECTROMAGNETIC RADIATION
Astronomy - Ch. 5: Light & E&M Radiation (2 of 30) Differences in Radiation
Visit http://ilectureonline.com for more math and science lectures! In this video I will discuss the differences of radiation from radio waves to gamma rays.
From playlist ASTRONOMY 5 LIGHT AND RADIATION
EEVblog #1186 - Solus Graphene Heater Kickstarter BUSTED!
Busting the SOLUS Kickstarter - "The Most Efficient Radiator In The World" based on "completely new, eco-friendly and graphene-based technology" "Save over 80% on your next heating utility bill"! TLDR; It's a crazy expensive 200W - 300W glass panel heater with magic woo-woo graphene paste
From playlist Debunking
EEVblog #1187 - Room Heater Technology Explained
A comprehensive tutorial on room (space) heater technology and their effectiveness and efficiency in heating rooms and homes. The different types of heat transfer are discussed, along with the different types of heater technology available and how they apply to room and object heating. The
From playlist Debunking
HEDS | Relativistically Transparent Magnetic Filaments
Relativistically Transparent Magnetic Filaments: a short-pulse platform for megaTesla fields, direct electron acceleration, and efficient gamma radiation HEDS Seminar Series- Hans RinderKnecht – July 22nd, 2021 LLNL-VIDEO-836254
From playlist High Energy Density Science Seminar Series
Physics 50 E&M Radiation (5 of 33) Parabolic Antenna and E&M Radiation and Temperature
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain electromagnetic radiation by studying the parabolic antenna. Next video in series: http://youtu.be/VtzyIr6CLpg
From playlist PHYSICS 50 ELECTROMAGNETIC RADIATION
Astronomy - Ch. 5: Light & E&M Radiation (11 of 30) Relationship: Radiation, Wavelength, and Opaque
Visit http://ilectureonline.com for more math and science lectures! In this video I will look at the relationship between radiations and their specific wavelengths.
From playlist ASTRONOMY 5 LIGHT AND RADIATION
Mod-01 Lec-33 Physics of scattering, emmision and absorption
Introduction to Atmospheric Science by Science Prof. C. Balaji,Department of Mechanical Engineering,IIT Madras.For more details on NPTEL visit http://nptel.ac.in
From playlist IIT Madras: Introduction to Atmospheric Science | CosmoLearning.org
Revolutionary Air Conditioner!
I explain the design and principles behind desiccant based air conditioning. This extremely efficient, DIY air conditioner is inexpensive to build and costs less than one half as much to run as a conventional, compressor based air conditioner. Previous related videos: https://youtu.be/Cby
From playlist Cooling
From playlist Courses and Series
Carbon Nanotubes Might Be the Secret Boost Solar Energy Has Been Looking For
One of the greatest challenges facing solar technology is wasted heat, but carbon nanotubes might be the high efficiency boost that solar cells need to succeed. » Subscribe to Seeker!http://bit.ly/subscribeseeker » Watch more Elements! http://bit.ly/ElementsPlaylist Solar panels are an i
From playlist Elements | Season 4 | Seeker
The Whole of AQA GCSE Physics Paper 1 | 25th May 2023
Covers in detail all the content needed for Combined and Separate science exams and both higher and foundation level. 2023 Predicted Exam Papers for GCSE and A-Level Biology, Chemistry, Physics, and Maths Revision Essential! https://www.primrosekitten.com/collections/predicted-papers FREE
From playlist Ultimate AQA GCSE Revision Playlist. For combined and separate science (Biology, Chemistry and Physics)
Astronomy - Ch. 5: Light & E&M Radiation (8 of 30) E&M Radiation...Safe or Dangerous?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain which electromagnetic radiation is dangerous and which are safe.
From playlist ASTRONOMY 5 LIGHT AND RADIATION
Mod-04 Lec-30 Photocatalysis - II
Nano structured materials-synthesis, properties, self assembly and applications by Prof. A.K. Ganguli,Department of Nanotechnology,IIT Delhi.For more details on NPTEL visit http://nptel.ac.in