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GK MCQs Section
Q. Which of the following are direct applications of lasers?
  1. Optical communication
  2. Holography
  3. Laser surgery
  4. Nuclear magnetic resonance
Select the correct option from the codes given below:
Answer: 1, 2 and 3 only
Notes: Lasers are directly used in optical communication, holography, and laser surgery. Nuclear magnetic resonance (NMR) uses strong magnetic fields and radio waves, not lasers, and was developed prior to laser technology. Therefore, only statements 1, 2, and 3 represent direct applications of lasers; statement 4 does not.
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