Who invented bifocal lens in 1780?

(Click on suggested Options to select the answer \| Color Red means : Wrong & Green Means: Correct)
Who invented bifocal lens in 1780? A. Benjamin Franklin B. Gottlieb Daimler C. James Maxwell D. John Fleming E. None Check Answer Complaint Here As Incorrect Question / Answer

Related Questions Who invented Bifocal Lens? A. Alfred B. Nobel B. Thomas Alva Edison C. Benjamin Franklin D. Rudolf Diesel Check Answer Complaint Here As Incorrect Question / Answer Achromatic Lens was invented by which British optician? A. John Dillos B. Thomas Adams C. Louis Braille D. John Dollond Check Answer Complaint Here As Incorrect Question / Answer Which one among the following was the first English newspaper in India in the year 1780 ? A. The Calcutta Gazette B. The Bengal Gazette C. The Bengal Journal D. The Bombay Herald Check Answer Complaint Here As Incorrect Question / Answer The focal length of convex lens is A. the same for all the colours B. shorter for blue light than for red C. shorter for red light than for blue D. maximum for yellow light Check Answer Complaint Here As Incorrect Question / Answer The focal length of the lens of a normal human eye is about A. 25cm B. 1m C. 2.5min D. 2.5cm Check Answer Complaint Here As Incorrect Question / Answer

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