Q. Archimedes is said to have repelled attacking Roman ships with the help of “burning glass”.

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Q. Solar furnaces are used to generate temperatures around ______ to produce hydrogen.

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Q. What is the typical temperature generated by solar furnaces to test materials for extreme environments?

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Q. What is a major drawback of solar furnaces to be used as a renewable source of energy on earth?

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Q. Solar furnaces can be used as solar cookers for domestic purposes.

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Q. The largest solar furnace is in France.

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Q. What is solar dryer?

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Q. What is the most popular use of solar dryer?

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Q. What are the two general types of solar dryers?

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Q. What is the basic working principle of direct solar dryers?

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Q. Which of the following best indicates an example of direct solar dryer?

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Q. How do wet clothes laid on wired lines dry under sunlight?

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Q. Which of the following surface is best suited to absorb sunlight?

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Q. How does an indirect solar dryer work?

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Q. Why is direct solar dryer harmful for food?

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Q. Indirect solar dryers protect the food.

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Q. _______ are used as air exhausts in indirect solar dryers.

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Q. A glass cover _______ solar dryers.

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Q. Which of the following best explains the increment in efficiency of a glass covered solar dryer?

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Q. Which of the following is an example of indirect solar dryer?

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