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Indian Navy Pilot Wave Optics — practice questions

Explore 4 free Wave 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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Wave Optics questions and exercises with answers

Showing questions 1–4 of 4.

Two coherent sources have intensities I1 = 9I and I2 = I. Maximum and minimum intensities in interference pattern:Read the answer and worked solution →In single-slit diffraction, ratio of intensities of first and central maxima is approximately:Read the answer and worked solution →Reflection or refraction?Read the answer and worked solution →True or false: opticsRead the answer and worked solution →

Worked practice questions

Two coherent sources have intensities I1 = 9I and I2 = I. Maximum and minimum intensities in interference pattern:

  1. 10I, 8I
  2. 16I, 4I
  3. 9I, I
  4. 16I, 0
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Correct answer: B. 16I, 4I

Amplitudes A1 ∝ sqrt(9I) = 3 sqrt(I), A2 = sqrt(I). We have I_max = (A1 + A2)². So I_max = 16I. We have I_min = (A1 - A2)². So I_min = 4I. (Not 0 since intensities are unequal.)

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In single-slit diffraction, ratio of intensities of first and central maxima is approximately:

  1. 1
  2. 1/4
  3. 4.5%
  4. 1/2
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Correct answer: C. 4.5%

First secondary maximum of single-slit pattern has intensity about 4.5% (= 1/22) of the central maximum. Most energy goes to central peak.

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Reflection or refraction?

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Items
  1. Item
    Light bounces back
    Category
    Reflection
  2. Item
    Angles are equal
    Category
    Reflection
  3. Item
    Image in a mirror
    Category
    Reflection
  4. Item
    Light bends
    Category
    Refraction
  5. Item
    Medium changes
    Category
    Refraction
  6. Item
    Stick looks bent
    Category
    Refraction
Categories
  1. Item
    Reflection
  2. Item
    Refraction
Instructions
Tap a description, then tap the phenomenon it belongs to.
_Source: syllabus Physics Ray Optics, RAY OPTICS_

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