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Which instrument is used to measure depth of ocean ?

  • Galvanometer
  • Fluxmeter
  • Endoscope
  • Fathometer
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1. The angle of reflection is equal to the angle of incidence.

  • True
  • False

2. All planets move around the sun in elliptical orbits, with the sun being at rest at one focus of the orbit.

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3. What is refractive index ?

  • it is defined as the ratio of speed of light in the medium to the speed of light in vacuum.
  • it is defined as the ratio of speed of light in vacuum to the speed of light in the medium .
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4. Which instrument is used to measure depth of ocean ?

  • Galvanometer
  • Fluxmeter
  • Endoscope
  • Fathometer

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