Who discovered that magnetic fields can split atomic spectral emission lines, a phenomenon known as the Zeeman Effect? MCQ with Answer and Explanation

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Who discovered that magnetic fields can split atomic spectral emission lines, a phenomenon known as the Zeeman Effect?

A. Hendrik Lorentz

B. Johannes Stark

C. Max Planck

D. Pieter Zeeman

Answer: Option D

Solution (By JKSSB Mock Tests)

Zeeman discovered the magnetic line splitting in 1896, which Lorentz explained theoretically, earning them a shared 1902 Nobel Prize.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who invented the first practical electronic calculator utilizing a microprocessor chip?

A. Busicom team and Intel (Masatoshi Shima, Ted Hoff)

B. Alan Turing

C. Charles Babbage

D. John von Neumann

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Correct Answer: Option A

Explanation:
The partnership between Busicom and Intel led to the invention of the Intel 4004, the first commercial programmable microprocessor.

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Who discovered that the planet Saturn has a prominent ring system and its largest moon, Titan?

A. William Herschel

B. Christiaan Huygens

C. Galileo Galilei

D. Giovanni Cassini

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Correct Answer: Option B

Explanation:
Christiaan Huygens correctly identified Saturn's rings in 1655 and discovered its largest moon, Titan.

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Question #3

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Who discovered the biological mechanism of continuous cell culturing, establishing the immortal 'HeLa cell line' in 1951?

A. Robert Koch

B. Alexander Fleming

C. George Otto Gey

D. Jonas Salk

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Correct Answer: Option C

Explanation:
George Gey isolated and successfully cultivated cervical cancer tissue cells from Henrietta Lacks without them dying out in laboratory vessels.

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