Good Friday 2018 is on Friday, March 30, 2018 (in 348 days). Good Friday 2017 has already passed: it was on Friday, April 14, 2017 (2 days ago).
What is solar energy? Solar energy is, simply, energy provided by the sun. This energy is in the form of solar radiation, which makes the production of solar electricity possible. Electricity can be produced directly from photovoltaic, PV, cells.
Solar radiation. Solar radiation is radiant energy emitted by the sun, particularly electromagnetic energy. About half of the radiation is in the visible short-wave part of the electromagnetic spectrum. The other half is mostly in the near-infrared part, with some in the ultraviolet part of the spectrum [1].