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May Liwanag by the Children of Light Community (2008) Midnight Prayer (1987–1989) Misa Tradionalis Latin Mass and Catechism (2020) Nothing But a Truth; Oras ng Himala (1996–2001) Oras Ng Katotohanan (1993–1995, 2001–2008) P.Y (Praise Youth) (1992–1996) Powerline (1995–2004) Power to Unite with Elvira (2010–2011, 2019–2020)
The following programming is exclusive to PBS Kids web-based platforms, such as the PBS Kids website, PBS Kids Video app, and other streaming platforms. This content is not broadcast by PBS Kids and has never been aired on television. 1 Co-distributed by Amazon Prime Video, the official streaming partner for PBS Kids programming. [1]
This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...
According to Energy Star, after salaries and benefits, energy costs are the largest operating expense for school districts. Fluorescent lighting systems are the most prevalent sources of illumination in schools. These systems provide low cost, long life, high efficacy, good color, and low levels of noise and flicker. Lighting systems should be ...
Cosmic rays or astroparticles are high-energy particles or clusters of particles (primarily represented by protons or atomic nuclei) that move through space at nearly the speed of light. They originate from the Sun, from outside of the Solar System in our own galaxy, [1] and from distant galaxies. [2]
Students' rights. The free school movement, also known as the new schools or alternative schools movement, was an American education reform movement during the 1960s and early 1970s that sought to change the aims of formal schooling through alternative, independent community schools .
Tritium radioluminescence is the use of gaseous tritium, a radioactive isotope of hydrogen, to create visible light. Tritium emits electrons through beta decay and, when they interact with a phosphor material, light is emitted through the process of phosphorescence. The overall process of using a radioactive material to excite a phosphor and ...
In physics, the term "light" may refer more broadly to electromagnetic radiation of any wavelength, whether visible or not. [ 4][ 5] In this sense, gamma rays, X-rays, microwaves and radio waves are also light. The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum, and polarization.