Bifocal lenses: Identify the inventor popularly credited with their creation. Full question: Who invented the bifocal lens? Choose the correct option.

Difficulty: Easy

Benjamin Franklin
Isaac Newton
Galileo Galilei
Christiaan Huygens

Correct Answer: Benjamin Franklin

Explanation:

Given data

Device: Bifocal spectacles (distance + near segments).

Concept / Approach
Benjamin Franklin is widely credited with inventing bifocals in the late 18th century to avoid switching between glasses for near and far vision.

Final Answer
Benjamin Franklin.

← Previous Question Next Question→

More Questions from Inventions

Reflecting road studs (cat's eyes): Identify the real-world observation that inspired their invention. Full question: What inspired the invention of reflecting road lights? Choose the correct option.
Lawn mower: Identify the year of the first invention. Full question: When was the first lawn mower invented? Choose the correct option.
Rigid airship: Identify the inventor most associated with the rigid type. Full question: Who invented the rigid airship? Choose the correct option.
Battery invention (general): Identify the inventor of the first practical battery. Full question: Who invented the battery? Choose the correct option.
U.S. patents (women inventors): Identify the first American female to receive a patent for her own invention. Context: The invention was a method of weaving straw with silk (used in bonnet/hat making), and the patent was issued in 1809. Choose the correct inventor.
Stationery innovation (1902): Identify the everyday office product created in Australia using half-size sheets, glue, and cardboard backing. Context: The invention standardized small, portable writing pads for note-taking. Choose the correct product.
Historical toys & parlour games (1892): Identify the ‘‘game’’ first produced by the Southern Novelty Company in Baltimore, Maryland. Context: Late 19th-century American novelty/game manufacturing tied to spirit-talking boards. Choose the correct game.
Model railroading history: State the year when the first Lionel trains were manufactured for display/consumer interest. Context: Joshua Lionel Cowen introduced “The Electric Express” in the early 20th century. Choose the correct year.
Food geography (brand origin): Identify the English village after which ‘‘Branston Pickle’’ is named. Context: The product was first made in the early 1920s near Burton upon Trent. Choose the correct location.
Foundations of electromechanical power: Identify the scientist credited with inventing the first electric generator. Context: Consider the 1831 Faraday disk (homopolar generator) and electromagnetic induction. Choose the correct inventor.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion