2005 General Studies, all questions

UPSC Prelims 2005 · General Studies

Question 49: Science and Technology

Who among the following invented Lasers?

aTheodore Maiman
bDenis Papin
cWillam Moton
dFancis Crick

AnswerThe answer is (a).

Theodore Maiman built the first working laser, a ruby laser, at Hughes Research Laboratories in California in 1960. Denis Papin worked on the steam digester, William Morton introduced ether as an anaesthetic in 1846, and Francis Crick co-discovered the structure of DNA with James Watson.

Why each option is right or wrong
  • (a) Correct: Theodore Maiman built the first working laser in 1960.
  • (b) Denis Papin is known for the steam digester.
  • (c) William Morton introduced ether anaesthesia in 1846.
  • (d) Francis Crick co-discovered the structure of DNA.

Explanation: written by UPSC Grade, not by UPSC.

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Source: UPSC, Civil Services (Preliminary) Examination 2005, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.