History and Advances in Solar Energy

The video provides a comprehensive overview of the history and development of solar energy, starting from ancient uses of solar power to modern advancements. It highlights key milestones such as the discovery of the photovoltaic effect, the creation of the first solar cells, and significant technological advancements in the 20th century. The video also discusses the role of solar energy in modern times and future prospects, including its potential to contribute significantly to clean energy goals.

What was one of the earliest uses of concentrated sunlight in ancient times?

• To power machines

• To make fire

• To heat water

• To generate electricity

Who is credited with building the world's first solar collector?

• Charles Fritz

• Horus de Saussure

• Albert Einstein

• Edmond Becquerel

What significant discovery did Edmond Becquerel make in 1839?

• The photovoltaic effect

• The photoelectric effect

• The theory of relativity

• The first solar cell

In which year was photovoltaic technology born in the United States?

• 1974

• 1964

• 1984

• 1954

What was the efficiency of the first commercially available photovoltaic cells achieved by Hoffman Electronics?

• 20%

• 5%

• 10%

• 15%

What was the price reduction achieved by Dr. Elliot Burman and Exxon Corporation for solar cells in the 1970s?

• $50 a watt

• $40 a watt

• $30 a watt

• $20 a watt

Which university established the first laboratory dedicated to photovoltaic research?

• Massachusetts Institute of Technology

• Stanford University

• University of Delaware

• Harvard University

What was the world's most advanced solar-powered airplane in 1996?

• Solar Impulse

• Iare

• Solar Challenger

• Icarus

What significant installation began at the International Space Station in 2000?

• Hydroelectric generators

• Wind turbines

• Geothermal plants

• Solar panels

By what year does President Obama aim for 80% of America's electricity to come from clean energy sources?

• 2040

• 2035

• 2030

• 2025