Background radiation equivalent time (BRET) or background equivalent radiation time (BERT) is a unit of measurement of ionizing radiation dosage amounting to one day worth of average human exposure to background radiation. BRET units are used as a measure of low level radiation exposure. The health hazards of low doses of ionizing radiation are unknown and controversial, because the effects, mainly cancer and genetic damage, take many years to appear, and the incidence due to radiation exposure can't be statistically separated from the many other causes of these diseases. The purpose of the BRET measure is to allow a low level dose to be easily compared with a universal yardstick: the average dose of background radiation, mostly from natural sources, that every human unavoidably receives during daily life. Background radiation level is widely used in radiological health fields as a standard for setting exposure limits. Presumably, a dose of radiation which is equivalent to what a person would receive in a few days of ordinary life will not increase his rate of disease measurably. (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 (30 of 33) Intensity of Light Example
Visit http://ilectureonline.com for more math and science lectures! In this video I will calculate the Emax and Bmax 5m away from a light source of 60W and wavelength of 700nm.
From playlist MOST POPULAR VIDEOS
Speed Of Light Is Constant!! (Quantum Physics)
#quantum #physics #waves #shorts #tiktok #NicholasGKK
From playlist Quantum Mechanics
Physics 50 E&M Radiation (29 of 33) Wavelength, Frequency, & Period Example
Visit http://ilectureonline.com for more math and science lectures! In this video I will describe and calculate the frequency, period and wave number of the electromagnetic radiation of a x-ray with a wave length of 0.01nm.
From playlist PHYSICS 50 ELECTROMAGNETIC RADIATION
International Time Zones (1 of 2: Why do we need them?)
More resources available at www.misterwootube.com
From playlist Time
What is the Cosmic Microwave Background Radiation? And what does it mean?
This video provides an overview of the accidental discovery and explanation of the cosmic microwave background radiation, the afterglow of the big bang. After reviewing the initial experimental work of Penzias and Wilson, a detailed account of the theoretical interpretation is presented, i
From playlist Cosmology
The way how to show time using clocks. It is 12 hours video you can use as a screensaver on clock, every number changing is completely random. Please enjoy.
From playlist Timers
National 5 Physics Live: Waves and radiation part 2
National 5 Physics 'Waves and radiation' - In this live session, I go over the second half of the National 5 Physics 'Waves and radiation' unit of National 5 Physics. Topics covered - alpha, beta & gamma radiation, half life, dosimetry equations. ------------------------------------------
From playlist National 5 LIVE lessons
Teach Astronomy - Radiation Density
http://www.teachastronomy.com/ It's easy to forget, since the night sky is so dark, that the universe is filled with radiation. The cosmic microwave background represents photons from the big bang stretched by the expansion of space with their energy reduced to microwaves. There are vast
From playlist 23. The Big Bang, Inflation, and General Cosmology 2
More resources available at www.misterwootube.com
From playlist Working with Time
Stochastic GW Background From the Early Universe (Lecture 1) by Shi Pi
PROGRAM ICTS SUMMER SCHOOL ON GRAVITATIONAL-WAVE ASTRONOMY (ONLINE) ORGANIZERS: Parameswaran Ajith (ICTS-TIFR, India), K. G. Arun (CMI, India), Bala R. Iyer (ICTS-TIFR, India) and Prayush Kumar (ICTS-TIFR, India) DATE : 05 July 2021 to 16 July 2021 VENUE : Online This school is part
From playlist ICTS Summer School on Gravitational-Wave Astronomy (ONLINE)
Is space-time fragmented, segmented into quantized bits of information, or causal sets? Or is space-time smooth and continuous, with curves, bends, and warps; just as Einstein had predicted? Is what we call space-time even part of objective reality or is it just a mathematical construct
From playlist Science
30. Radiation Dose, Dosimetry, and Background Radiation
MIT 22.01 Introduction to Nuclear Engineering and Ionizing Radiation, Fall 2016 Instructor: Michael Short View the complete course: https://ocw.mit.edu/22-01F16 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP61FVzAxBP09w2FMQgknTOqu Units of radiation dose to biological
From playlist MIT 22.01 Introduction to Nuclear Engineering and Ionizing Radiation, Fall 2016
Climate Dynamics of Condensible-Rich Exoplanet Atmospheres - Ray Pierrehumbert
Joint IAS/Princeton University Astrophysics Colloquium Tuesday, November 10, 2015 http://www.sns.ias.edu/~seminar/colloquia.shtml On the present Earth, the primary condensible substance — water vapor — represents only a few percent of the mass of the atmosphere. While the effects of the
From playlist Joint IAS/PU Astrophysics Colloquium
From playlist Courses and Series
Deriving Hawking's most famous equation: What is the temperature of a black hole?
Black holes are perhaps the most enigmatic objects in the universe. Popularised in movies and science fiction, they evoke the magic and mystery of our universe and provide inspiration for those looking to make their mark in the world of academic physics. But what exactly is a black hole? A
From playlist Relativity
http://www.teachastronomy.com/ The Sun is the source of all life on Earth. Radiation from the Sun reaches us in eight minutes. We are bathed in light and radiation from this glowing ball of gas, a hundred times the Earth's size. At a distance of 150 million kilometers, or 98 million mil
From playlist 12. Formation and Nature of Planetary Systems
From playlist Courses and Series
Teach Astronomy - Scales of Time
http://www.teachastronomy.com/ Astronomy spans an enormous range in scales of time as well. The shortest thing we can measure, 10-23 seconds, is the time it takes light to cross a proton. Visible waves of light have a frequency of about 1015 Hertz, which means that one oscillation of lig
From playlist 01. Fundamentals of Science and Astronomy