6
Q:

Who invented Bifocal Lens?

A) John Adams B) Benjamin Franklin
C) James Madison D) Thomas Jefferson

Answer:   B) Benjamin Franklin



Explanation:

Benjamin Franklin has long been credited with the invention of bifocal lenses and he was the first to wear bifocal lenses. He did not produce them himself but instead had some optician in London or France make them for him to overcome Presbyopia, a condition that Franklin suffered. He was tired switching between lenses for far and near sightedness. And that resulted in inventing Bifocal Lenses.

Subject: Inventions
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Q:

Who discovered Insulin?

A) Sir Alexander Fleming B) Frederick Banting
C) James Watt D) Sir F.G. Hopkins
 
Answer & Explanation Answer: B) Frederick Banting

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Q:

Who invented the hot air balloon?

A) Montgolfier brothers B) Wright brothers
C) Lisitsyn brothers D) Walton brothers
 
Answer & Explanation Answer: A) Montgolfier brothers

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Q:

Who invented the thermos flask?

A) Ray Tomlinson B) Tim Berners-Lee
C) William Cullen D) James Dewar
 
Answer & Explanation Answer: D) James Dewar

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Q:

Who invented radar?

A) Fred Morrison B) A. H. Taylor and Leo C. Young
C) Van Tassel D) W. K. Roentgen
 
Answer & Explanation Answer: B) A. H. Taylor and Leo C. Young

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Q:

Who discovered electron?

A) E. Goldstien B) J. J. Thomson
C) Ernest Rutherford D) J. Chadwick
 
Answer & Explanation Answer: B) J. J. Thomson

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Q:

Edward Jenner discovered vaccine for which of the following disease?

A) Polio B) Tuberculosis
C) Small Pox D) Rabies
 
Answer & Explanation Answer: C) Small Pox

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Q:

Who developed the theory of relativity?

A) Issac Newton B) Charles Darwin
C) Marie Curie D) Albert Einstein
 
Answer & Explanation Answer: D) Albert Einstein

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Q:

Who invented the Centigrade scale?

A) Anders Celsius B) Daniel Gabriel Fahrenheit
C) William Thomson D) Wright Brothers
 
Answer & Explanation Answer: A) Anders Celsius

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