NEET Physics: Wave Optics — MCQ Test 9

Q6. What is the intensity at a point in a double-slit experiment where the phase difference is \( \pi/4 \), if the maximum intensity is \( 4I_0 \)?

Q7. Why does the interference pattern disappear if the phase difference between two sources changes rapidly over time?

Q8. What type of wavefront emerges from a convex lens when a plane wave is incident on it?

Q9. What is the resultant amplitude of two coherent waves of amplitude \( a \) with a phase difference of \( 5\pi \)?

Q10. What is the refractive index of a medium if the speed of light in it is \( 2.4 \times 10^8 \, \text{m/s} \) and in vacuum is \( 3.0 \times 10^8 \, \text{m/s} \)?

NEET Physics — Wave Optics

Free MCQ Test 9 of 22

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What type of wave is light, based on the direction of its electric field relative to its propagation direction?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Wave Optics. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Direction, Electric, Relative, Propagation, Distance, and Experiment.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. What type of wave is light, based on the direction of its electric field relative to its propagation direction?

  • A. Transverse
  • B. Longitudinal
  • C. Stationary
  • D. Mechanical

Q2. What is the distance of the fourth dark fringe from the central maximum in a double-slit experiment if \( \lambda = 610 \, \text{nm} \), \( d = 0.3 \, \text{mm} \), and \( D = 1.5 \, \text{m} \)?

  • A. 9.15 mm
  • B. 12.2 mm
  • C. 10.7 mm
  • D. 7.6 mm

Q3. What is the wavelength of light in a medium with refractive index 1.6 if its wavelength in vacuum is \( 640 \, \text{nm} \)?

  • A. 400 nm
  • B. 640 nm
  • C. 320 nm
  • D. 500 nm

Q4. What is the wavelength of light in a medium with refractive index 1.5 if its wavelength in air is \( 720 \, \text{nm} \)?

  • A. 480 nm
  • B. 720 nm
  • C. 360 nm
  • D. 600 nm

Q5. What is the refractive index of a medium if the critical angle for light passing into air is \( 42^\circ \)?

  • A. 1.33
  • B. 1.67
  • C. 1.49
  • D. 1.55

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