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2. Houzz - Wikipedia

   en.wikipedia.org/wiki/Houzz

   65 million (November 2021) [ 1] Launched. February 2009; 15 years ago. ( 2009-02) Houzz is an American website, online community and software for architecture; interior design and decorating; landscape design and home improvement. It was founded in 2009 and is based in Palo Alto, California .

3. Solar irradiance - Wikipedia

   en.wikipedia.org/wiki/Solar_irradiance

   Solar irradiance is the power per unit area ( surface power density) received from the Sun in the form of electromagnetic radiation in the wavelength range of the measuring instrument. Solar irradiance is measured in watts per square metre (W/m 2) in SI units .

4. Schumann resonances - Wikipedia

   en.wikipedia.org/wiki/Schumann_resonances

   Schumann resonances occur because the space between the surface of the Earth and the conductive ionosphere acts as a closed, although variable-sized waveguide. The limited dimensions of the Earth cause this waveguide to act as a resonant cavity for electromagnetic waves in the extremely low frequency band. The cavity is naturally excited by ...

5. Sunlight - Wikipedia

   en.wikipedia.org/wiki/Sunlight

   Taken on 20 October 1968 from Apollo 7. Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is scattered and filtered through Earth's atmosphere as daylight when the Sun is above the horizon.

6. Ultraviolet index - Wikipedia

   en.wikipedia.org/wiki/Ultraviolet_index

   When the UV index is presented on a daily basis, it represents UV intensity around the sun's highest point in the day, called solar noon, halfway between sunrise and sunset. This typically occurs between 11:30 and 12:30, or between 12:30 and 13:30 in areas where daylight saving time is being observed.

7. Solar radio emission - Wikipedia

   en.wikipedia.org/wiki/Solar_radio_emission

   Solar radio emission. Solar radio emission refers to radio waves that are naturally produced by the Sun, primarily from the lower and upper layers of the atmosphere called the chromosphere and corona, respectively. The Sun produces radio emissions through four known mechanisms, each of which operates primarily by converting the energy of moving ...