Who discovered that light waves can be deflected and focused by intense gravitational fields, a phenomenon known as gravitational lensing? MCQ with Answer and Explanation

Question

Who discovered that light waves can be deflected and focused by intense gravitational fields, a phenomenon known as gravitational lensing?

A. Edwin Hubble

B. Albert Einstein

C. Arthur Eddington

D. Isaac Newton

Answer: Option B

Solution (By JKSSB Mock Tests)

Albert Einstein predicted gravitational lensing under his General Theory of Relativity, which was later observed observationally.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered the radioactive elements Radium and Polonium?

A. Henri Becquerel

B. Ernest Rutherford

C. Otto Hahn

D. Marie and Pierre Curie

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Correct Answer: Option D

Explanation:
Marie Skłodowska-Curie and her husband Pierre isolated polonium and radium from pitchblende ore in 1898.

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Question #2

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The invention of the modern mechanical reaper, which automated grain harvesting, was patented by whom?

A. Cyrus McCormick

B. Eli Whitney

C. John Deere

D. James Hargreaves

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Correct Answer: Option A

Explanation:
Cyrus McCormick patented the horse-drawn mechanical reaper in 1834, transforming agricultural output.

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Question #3

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Who invented the first mass-market portable music device, the Walkman, introduced by Sony in 1979?

A. Nobutoshi Kihara

B. Masaru Ibuka

C. Akio Morita

D. Steve Jobs

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Correct Answer: Option A

Explanation:
Audio engineer Nobutoshi Kihara designed the Walkman under the direction of Sony co-founder Akio Morita.

This question belongs to: Static General Knowledge Inventions and Discoveries

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