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Optics and Sound Questions for NDA

Free, AI-curated practice for the Optics and Sound section of NDA. We have 15+ verified questions in this bank. Below: 5 sample questions. Sign up free to unlock unlimited practice + AI explanations + per-topic analytics.

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Sample questions

Q1 · medium · AI-verified
A sound wave has a frequency of 440 Hz and travels at 330 m/s in air. What is its wavelength?
  1. 0.65 m
  2. 0.85 m
  3. 1.33 m
  4. 0.75 m
Q2 · medium · AI-verified
In Young's double slit experiment, if the distance between slits is doubled while keeping other parameters constant, the fringe width will:
  1. Become half
  2. Become double
  3. Remain same
  4. Become four times
Q3 · medium · AI-verified
A sound wave of frequency 340 Hz travels in air with velocity 340 m/s. What is the wavelength of the sound wave?
  1. 1 m
  2. 2 m
  3. 0.5 m
  4. 1.5 m
Q4 · medium · AI-verified
Two coherent sources of light of wavelength 600 nm produce interference pattern. If the path difference between waves is 1800 nm, what type of interference occurs?
  1. Constructive interference
  2. Destructive interference
  3. No interference
  4. Partial interference
Q5 · medium · AI-verified
The intensity level of sound increases by 20 dB. By what factor does the intensity increase?
  1. 100
  2. 20
  3. 10
  4. 200
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