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Indian Navy AA (Artificer Apprentice) Ray and Wave Optics — practice questions

Explore 33 free Ray and Wave Optics questions in Indian Navy AA (Artificer Apprentice) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Ray and Wave Optics questions and exercises with answers

Showing questions 1–30 of 33.

For a plane mirror, image is:Read the answer and worked solution →For a convex lens, object placed at 2f forms image at:Read the answer and worked solution →Power of a lens of focal length 20 cm (in dioptres):Read the answer and worked solution →Two thin lenses with powers +5 D and -3 D in contact. Equivalent power:Read the answer and worked solution →For thin-film interference (oil on water), constructive interference for reflection condition: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).

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

  1. Infinity
  2. f
  3. 2f, same size, inverted, real
  4. Between f and 2f
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Correct answer: C. 2f, same size, inverted, real

**Convex lens with object at 2f:** image at 2f on other side, same size (|m|=1), inverted, real. One of the standard imaging cases used in basic optics problems. f-2f-2f-f rule of thumb.

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Power of a lens of focal length 20 cm (in dioptres):

  1. 20
  2. 5 (= 1/0.20)
  3. 0.5
  4. -5
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Correct answer: B. 5 (= 1/0.20)

P = 1/f (f in meters). f = 0.20 m, so P = 5 D. Convex lens: positive. Concave: negative. **Combined lenses in contact:** P = P₁ + P₂.

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