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Engineering Physics MCQs – Practice Test 1 (Chapter 24)

Optical Diffraction MCQs with Answers PDF Download – Test 1

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Free Optical Diffraction MCQs App Download: "Diffraction pattern of circular disc shaped intermediate dark and bright fringes with a central bright spot, formed when light passes through a small circular aperture, is called"; MCQ with answers: curved aperture diffraction, circular aperture diffraction, triangular aperture diffraction, and rectangular aperture diffraction. Solve Electric Potential Quiz Questions, download Google e-Book (Free Chapter) to support educational advancement.

Optical Diffraction MCQs – Practice Test 1 PDF Download

MCQ 1: Diffraction pattern of circular disc shaped intermediate dark and bright fringes with a central bright spot, formed when light passes through a small circular aperture, is called:

  1. Circular Aperture Diffraction
  2. Curved Aperture Diffraction
  3. Triangular Aperture Diffraction
  4. Rectangular Aperture Diffraction

MCQ 2: In Bragg's Law, angle of incident and reflection is called:

  1. Bragg's angle
  2. Manchest angle
  3. Dual angle
  4. Newton;s angle

MCQ 3: If wave's first side diffraction maximum is 15° and is coinciding with first minimum of red light, then wavelength of light is:

  1. 430 nm
  2. 120 nm
  3. 350 nm
  4. 1200 nm

MCQ 4: If θ is angular separation of two lines whose wavelength differ by Δλ, then dispersion is equals to:

  1. Δλ/Δθ
  2. Δθ/Δλ
  3. Δθ/2Δλ
  4. ΔθxΔλ

MCQ 5: If a slit of width 'a' is illuminated by white light, then value of 'a' at which the first minimum for red light of wavelength 650 nm appears at θ=15°, is:

  1. 25 µm
  2. 2.5 µm
  3. 250 µm
  4. 25 m

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