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Which of the following statement(s) is(are) correct? 1. Lasers can be made from a solid or a liquid medium but not from a gaseous medium. 2. Lasers are highly collimated beams of light.
This question appeared in the GPSC Prelims 2018 examination (GS-II). It is Question 148 out of 397 questions in this paper.
This question was part of the GPSC Prelims 2018 (GS-II). The GPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all GPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.