Start learning →

Indian Navy Pilot Ray Optics and Optical Instruments — practice questions

Explore 31 free Ray Optics and Optical Instruments questions in Indian Navy Pilot Physics. Open each question or exercise to read its content, reference answers and available explanation.

Practise Ray Optics and Optical Instruments with Quill →

Ray Optics and Optical Instruments questions and exercises with answers

Showing questions 1–30 of 31.

For a plane mirror, image is:Read the answer and worked solution →Refractive index of water is 1.33. Critical angle for water-air interface:Read the answer and worked solution →For a convex lens, an object at 2f forms image at:Read the answer and worked solution →In a compound microscope, magnification by objective is m_o, eyepiece is m_e. Total magnification:Read the answer and worked solution →The apparent depth of an object lying at the bottom of a pool of water (n = 4/3) is, in terms of its real depth h,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 →Order the reasoning: why an optical fibre worksRead the answer and worked solution →True or false: mirrors and lensesRead the answer and worked solution →Assertion and reason: instrumentsRead the answer and worked solution →

Worked practice questions

For a plane mirror, image is:

  1. Virtual, inverted
  2. Real, magnified
  3. Real, inverted
  4. Virtual, erect, same size, behind mirror
Show answer and solution

Correct answer: D. Virtual, erect, same size, behind mirror

Plane mirror produces virtual (cannot be projected on screen), erect, same-size image as far behind the mirror as object is in front. Lateral inversion (left ↔ right).

Open this question →

Refractive index of water is 1.33. Critical angle for water-air interface:

  1. 30°
  2. sin⁻¹(1/1.33) ≈ 48.75°
  3. 90°
  4. 60°
Show answer and solution

Correct answer: B. sin⁻¹(1/1.33) ≈ 48.75°

sin θ_c = 1/n = 1/1.33 ≈ 0.752. θ_c ≈ 48.75°. Beyond this, light striking water-air interface from inside undergoes TIR.

Open this question →

For a convex lens, an object at 2f forms image at:

  1. Infinity
  2. f
  3. Behind lens
  4. 2f, same size, inverted, real
Show answer and solution

Correct answer: D. 2f, same size, inverted, real

**Object at 2f:** image at 2f, magnification = -1 (inverted, same size, real). One of standard cases of thin lens used to derive imaging chart.

Open this question →

How to practise

  1. Choose a Ray Optics and Optical Instruments question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Physics topics

Work and EnergyPhysics and MeasurementWork and PowerOpticsCurrent ElectricityC9kineticenergyEnergy Transfer in SystemsPotential and Kinetic Energy