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Indian Navy Pilot Optics — practice questions

Explore 34 free Optics questions in Indian Navy Pilot Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Optics questions and exercises with answers

Showing questions 1–30 of 34.

Newton's FIRST law is also called the law of:Read the answer and worked solution →The SI unit of force is the:Read the answer and worked solution →A block of mass 2 kg on a smooth incline at 30°. Acceleration down the incline (g = 10):Read the answer and worked solution →A pendulum of mass m swings to amplitude angle θ. At the lowest point of swing, the TENSION in the string equals:Read the answer and worked solution →As per your syllabus, Newton's SECOND law in SI units states which relation?Read the answer and worked solution →As per your syllabus, the IMPULSE J of a force F acting for time Δt equals which quantity?Read the answer and worked solution →As per your syllabus, KINETIC (sliding) friction is approximately given by which relation?Read the answer and worked solution →As per your syllabus, the coefficients of static and kinetic friction satisfy which order?Read the answer and worked solution →Cartesian sign convention: positive or negative?Read the answer and worked solution →True or false: the sign conventionRead the answer and worked solution →Complete the condition for total internal reflectionRead the answer and worked solution →Tap every example of total internal reflectionRead the answer and worked solution →Critical angleRead the answer and worked solution →True or false: optical fibresRead the answer and worked solution →Match each formula to what it describesRead the answer and worked solution →Converging or diverging?Read the answer and worked solution →Complete the definition of lens powerRead the answer and worked solution →Lenses in contactRead the answer and worked solution →Order the steps: solve a mirror problemRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Match each instrument to its magnifying powerRead the answer and worked solution →True or false: optical instrumentsRead the answer and worked solution →Which instrument does this belong to?Read the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every statement true of refractionRead the answer and worked solution →Complete the prism relationRead the answer and worked solution →Flip and pair: symbol with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Reading the laws backRead the answer and worked solution →

Worked practice questions

Newton's FIRST law is also called the law of:

  1. Inertia
  2. Action and reaction
  3. Gravity
  4. Friction
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Correct answer: A. Inertia

Law of Inertia: An object at rest stays at rest, and an object in motion stays in motion at constant velocity, unless acted upon by an unbalanced external force.

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The SI unit of force is the:

  1. joule
  2. newton
  3. watt
  4. pascal
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Correct answer: B. newton

Newton (N). 1 N = 1 kg·m/s² — the force that gives a 1 kg mass an acceleration of 1 m/s².

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A block of mass 2 kg on a smooth incline at 30°. Acceleration down the incline (g = 10):

  1. 2.5 m/s²
  2. 5 m/s²
  3. 10 m/s²
  4. 20 m/s²
Show answer and solution

Correct answer: B. 5 m/s²

**Down the smooth incline:** a = g sin θ = 10 × sin 30° = 10 × 0.5 = 5 m/s². Mass doesn't matter on smooth incline.

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