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Points of Light has approximately 120 affiliates in 32 countries and partnerships with thousands of nonprofits and companies. In 2012, Points of Light mobilized 4 million volunteers in 30 million hours of service worth $635 million. [1] Points of Light received the highest possible rating (4-stars) on Charity Navigator in 2012, 2011, and 2010. [9]
The first known instance of the phrase "a thousand points of light" appears in Arthur C. Clarke's short story "Rescue Party," initially published in Astounding Science-Fiction, May 1946: One entire wall of the control room was taken up by the screen, a great black rectangle that gave an impression of almost infinite depth.
"Point of Light" is a song written by Don Schlitz and Thom Schuyler, and recorded by American country music artist Randy Travis. It was released in May 1991 as the lead-off single from his album High Lonesome .
The marker on The Extra Mile, depicting W. E. B. Du Bois (left) and Mary White Ovington (right) in 2006. The Extra Mile – Points of Light Volunteer Pathway is a memorial in Washington D.C. Located adjacent to the White House, the monument is composed of 34 bronze medallions honoring people who "through their caring and personal sacrifice, reached out to others, building their dreams into ...
Beam of sun light inside the cavity of Rocca ill'Abissu at Fondachelli-Fantina, Sicily. The speed of light in vacuum is defined to be exactly 299 792 458 m/s (approximately 186,282 miles per second). The fixed value of the speed of light in SI units results from the fact that the metre is now defined in terms of the speed of light.
While light from stars and other astronomical objects is likely to twinkle, [10] twinkling usually does not cause images of planets to flicker appreciably. [ 11 ] [ 12 ] Stars twinkle because they are so far from Earth that they appear as point sources of light easily disturbed by Earth's atmospheric turbulence, which acts like lenses and ...
In the relativistic case, the light ahead of the observer is blueshifted to a wavelength of 137 nm in the far ultraviolet, while light behind the observer is redshifted to 2400 nm in the short wavelength infrared. Because of the relativistic aberration of light, objects formerly at right angles to the observer appear shifted forwards by 63°.
Airy diffraction patterns generated by light from two point sources passing through a circular aperture, such as the pupil of the eye. Points far apart (top) or meeting the Rayleigh criterion (middle) can be distinguished. Points closer than the Rayleigh criterion (bottom) are difficult to distinguish.