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Solar energy correct answers is a renewable energy source derived from the sun's radiation. Solar energy correct answers It is harnessed through photovoltaic (PV) cells and solar thermal systems. Solar energy correct answers plays a vital role in reducing carbon emissions and addressing clima...

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  • August 28, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • SOLAR ENERGY/PV AND THERMAL
  • SOLAR ENERGY/PV AND THERMAL

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SOLAR ENERGY/PV AND THERMAL || with 100%
Errorless Solutions.
Solar energy correct answers is a renewable energy source derived from the sun's radiation.

Solar energy correct answers It is harnessed through photovoltaic (PV) cells and solar thermal
systems.

Solar energy correct answers plays a vital role in reducing carbon emissions and addressing
climate change.

OVERVIEW OF THE HISTORY AND DEVELOPMENT OF SOLAR ENERGY correct
answers Early years (7th century BCE to 1800s)
1800s
Early 1900s
Late 1900s (1960s to 1990s)
2005
Mid-2010s
Present

Early years (7th century BCE to 1800s) correct answers Using solar energy dates back as early as
the 7th century BCE. Humans learned about the properties of magnification with glass materials
and discovered they could light fires when using glass with sunlight.
•
The ancient Greek, Roman, and Chinese civilizations harnessed this method by using mirrors to
light torches for their religious rituals. These were known as "burning mirrors." In addition, some
bathhouses built by the Romans used windows to direct sunlight into specific areas, known as
sunrooms. The concept is still used in modern buildings today.
•
The Anasazi, ancestors to the Puebloans, utilized the sun's heat by building south-facing homes
on cliffs. The sunlight kept the communities warm during the winter.

1800s correct answers •
There's some debate among scientists on to whom they can attribute the invention of solar
panels. Some argue for Edmond Becquerel, a 19-year-old French scientist who, in 1839,
discovered the photovoltaic effect, which is the creation of a current through certain materials'
exposure to sunlight.
•
Further discoveries regarding solar energy took place in 1873. An electric engineer named
Willoughby Smith found that the chemical element selenium was photoconductive, meaning that
the material could conduct electricity when exposed to light.
•
William Grylls Adams and Richard Evans Day took this study further and discovered that
selenium could create electricity when exposed to sunlight.
•

, Historians argue that Adams and Day's experiments led to the invention of solar cells by Charles
Fritts. In 1883, Fritts used selenium wafers to create the first solar cell prototype, a glass box
with a sheet of selenium sandwiched between a semi-transparent gold leaf and a layer of a
metallic brass substrate.

Early 1900s correct answers •
Research into solar energy continued into the 1900s.
•
In 1905, Albert Einstein contributed to the growth of solar research and quantum physics by
publishing a paper that theorized the exposure of metals to light could "liberate" electrons. The
piece won him the Nobel prize in 1921, and his theory became known as the Law of the
Photoelectric Effect.
•
Solar power research took a step further in 1918 when Jan Czochralski, a Polish chemist,
discovered a way to grow single-crystal silicon. Czochralskiaccidentally dipped the tip of his pen
into a tin pot, resulting in a single-crystal strand of tin.
•
The method eventually became known as the Czochralskiprocess, which companies use to
produce single-crystal silicon in solar cells today.

Late 1900s (1960s to 1990s) correct answers •
Silicon solar cells came into the picture in 1954 when David Chapin, Calvin Fuller, and Gerald
Pearson created the first photovoltaic cell. The three researchers worked for Bell Labs and were
trying to solve a problem with the company's telephone system.
•
Bell executives demonstrated their invention, the Bell Solar Battery, by powering a radio that
broadcasted voice and music. The New York Times called it "the beginning of a new era."
•
By 1956, solar cells were available on the market but were still too expensive for the average
consumer to buy. The US government was among the earliest users of the technology.
•
The Vanguard I, launched in 1958, was the first satellite with a solar panel installed, which
powered its radios. More satellites followed photovoltaic technology, namely Vanguard II,
Explorer III, and Sputnik-3.
•
More devices using solar energy followed. For example, Paul Macready, an aeronautical
engineer, built an airplane in 1981 that used solar cells to promote them as renewable energy
sources. He flew the plane from France to the UK across the English Channel and built another
solar-powered aircraft, the Gossamer Penguin.
•
In 1982, an adventurer named Hans Tholstrupdrove the Quiet Achiever across Australia. It's the
first solar-powered car to cross an entire continent. Race car driver Larry Perkins designed and
built the Quiet Achiever alongside his brother, Garry.

2005 correct answers •

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