The invention of the common electronic LED (Light Emitting Diode) operating in the visible light spectrum was developed by whom? MCQ with Answer and Explanation

The invention of the common electronic LED (Light Emitting Diode) operating in the visible light spectrum was developed by whom?
A. Thomas Edison
B. Nick Holonyak
C. Theodore Maiman
D. Shuji Nakamura
Answer: Option B
Solution (By JKExamLibrary)
Nick Holonyak invented the first practical visible-spectrum (red) light-emitting diode in 1962 while working at General Electric.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Inventions and Discoveries Questions

Question #1 Report Error
Who discovered the antibiotic Streptomycin, the first effective cure for tuberculosis, winning a Nobel Prize in 1952?
A. Howard Florey
B. Edward Abraham
C. Selman Waksman
D. Alexander Fleming

Correct Answer: Option C


Explanation:
Selman Waksman discovered several antibiotics produced by soil microbes, including streptomycin.

Question #2 Report Error
The invention of the common matchstick containing phosphorus triggered by friction was developed by whom?
A. John Walker
B. Robert Boyle
C. Antoine Lavoisier
D. Humphry Davy

Correct Answer: Option A


Explanation:
English chemist John Walker invented the first friction match in 1826 by coating cardboard or wooden splints with sulfide pastes.

Question #3 Report Error
The first practical automatic dishwasher was invented and patented by which female innovator in 1886?
A. Mary Anderson
B. Stephanie Kwolek
C. Josephine Cochrane
D. Grace Hopper

Correct Answer: Option C


Explanation:
Josephine Cochrane designed the first successful hand-powered mechanical dishwasher because she wanted to protect her fine china from chipping.