NEET Physics: Wave Optics — MCQ Test 10

Q6. What is the phase difference corresponding to a path difference of \( 3\lambda/2 \) in a double-slit experiment?

Q7. What is the frequency of light with a wavelength of \( 570 \, \text{nm} \) in air, given the speed of light in air is \( 3.0 \times 10^8 \, \text{m/s} \)?

Q8. In a double-slit experiment, if the screen distance is doubled, what happens to the fringe width?

Q9. In a double-slit experiment, if the path difference at a point is \( \lambda/2 \), what is the resulting intensity if the maximum intensity is \( 4I_0 \)?

Q10. Why does the wave theory suggest that light’s behavior approximates straight-line propagation in large-scale scenarios?

NEET Physics — Wave Optics

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What happens to the central maximum’s width in a single-slit diffraction pattern if the wavelength is doubled?

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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 Diffraction, Wavelength, Intensity, Polaroids, Unpolarized, and Refractive.

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 happens to the central maximum’s width in a single-slit diffraction pattern if the wavelength is doubled?

  • A. Halves
  • B. Remains the same
  • C. Quadruples
  • D. Doubles

Q2. What is the intensity of light after passing through two polaroids with pass-axes at \( 15^\circ \), if the initial unpolarized intensity is \( I_0 \)?

  • A. \( \frac{I_0}{4} \)
  • B. \( \frac{7I_0}{16} \)
  • C. \( \frac{I_0}{8} \)
  • D. \( \frac{I_0}{2} \)

Q3. What is the speed of light in a medium with refractive index 1.4, given the speed in vacuum is \( 3.0 \times 10^8 \, \text{m/s} \)?

  • A. \( 2.14 \times 10^8 \, \text{m/s} \)
  • B. \( 2.0 \times 10^8 \, \text{m/s} \)
  • C. \( 1.5 \times 10^8 \, \text{m/s} \)
  • D. \( 3.0 \times 10^8 \, \text{m/s} \)

Q4. Why does the wave theory predict a change in wavelength but not frequency during refraction?

  • A. Amplitude varies
  • B. Speed equals frequency
  • C. Frequency is source-dependent
  • D. Phase shifts randomly

Q5. What happens to the fringe width in a double-slit experiment if the wavelength of light is halved?

  • A. Doubles
  • B. Remains the same
  • C. Quadruples
  • D. Halves

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