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- Question
Who invented Bifocal Lens?
Options- A. John Adams
- B. Benjamin Franklin
- C. James Madison
- D. Thomas Jefferson
- Correct Answer
- Benjamin Franklin
ExplanationBenjamin 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.
- 1. Who invented Dynamite?
Options- A. Graham Bell
- B. Nikola Tesla
- C. Alfred Nobel
- D. Louis Pateur Discuss
- 2. Who invented Automobiles using gasoline?
Options- A. Karl Benz
- B. Kirk Macmillan
- C. Thomas Alva Edison
- D. William Ford Discuss
- 3. What invention caused many deaths while testing it?
Options- A. Dynamite
- B. Ladders
- C. Race cars
- D. Parachute Discuss
- 4. Which object, initially called the 'Whirlwind', was invented by Ives McGaffey in 1869 ?
Options- A. Washing machine
- B. Electric mixer
- C. Vacuum cleaner
- D. Blender Discuss
- 5. We remember Charles Babbage (1792-1871) for what ?
Options- A. Computers
- B. Radio-Telegraphy
- C. Steam Boating
- D. Telescopes Discuss
- 6. Who invented Electrocardiograph(EKG)? Discuss
- 7. Who was the first person to patent the JET ENGINE?
Options- A. F. Whittle
- B. C. Lindbergh
- C. W. Histell
- D. B. Owings Discuss
- 8. Who had an explosive idea and first patented DYNAMITE?
Options- A. J. R. Gluber
- B. A. Nobel
- C. G. Fawks
- D. W. Bickford Discuss
- 9. Landstrom invented
Options- A. Metallurgy
- B. Gas Engine
- C. Safety Match
- D. None of these Discuss
- 10. Who dicovered X-rays? Discuss
Inventions problems
Search Results
Correct Answer: Alfred Nobel
Explanation:
Alfred Bernhard Nobel was a Swedish chemist, engineer, inventor, businessman, and philanthropist. Known for inventing Dynamite, Nobel also owned Bofors, which he had redirected from its previous role as primarily an iron and steel producer to a major manufacturer of cannon and other armaments.
Correct Answer: Karl Benz
Correct Answer: Parachute
Correct Answer: Vacuum cleaner
Correct Answer: Computers
Correct Answer: The EKG was invented by Willem Einthoven in 1903 and is used to monitor and analyze past and present heart activity in an individual
Correct Answer: F. Whittle
Correct Answer: A. Nobel
Correct Answer: Safety Match
Correct Answer: In 1985 the physicist Wilhelm Rontgen discovered X-rays, the "X" signifying their unknown originHe later found that the rays could pass through flesh and by using photographic plates could make images of bones inside the body
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