NEET Physics: Wave Optics — MCQ Test 5

Q6. What is the angular position of the second minimum in a single-slit diffraction pattern if the slit width is \( 8.0 \, \mu\text{m} \) and the wavelength is \( 640 \, \text{nm} \)?

Q7. Why does the diffraction pattern of a single slit show a central maximum broader than its secondary maxima?

Q8. What is the wavelength of light in a medium with refractive index 1.65 if its wavelength in air is \( 660 \, \text{nm} \)?

Q9. What is the phase difference corresponding to a path difference of \( 3\lambda/4 \) in a double-slit experiment?

Q10. What is the condition for total internal reflection to occur?

NEET Physics — Wave Optics

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What happens to the refracted ray when the angle of incidence exceeds the critical angle?

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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 Refracted, Incidence, Critical, Intensity, Transmitted, and Polaroids.

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 refracted ray when the angle of incidence exceeds the critical angle?

  • A. Bends towards the normal
  • B. Bends away from the normal
  • C. Undergoes total internal reflection
  • D. Passes undeflected

Q2. What is the maximum intensity of light transmitted through three polaroids when the first and third are crossed, and the middle one is rotated, if the initial intensity is \( I_0 \)?

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

Q3. What is the condition for the second secondary maximum in a single-slit diffraction pattern?

  • A. \( \theta = \frac{3\lambda}{2a} \)
  • B. \( \theta = \frac{2\lambda}{a} \)
  • C. \( \theta = \frac{\lambda}{a} \)
  • D. \( \theta = \frac{5\lambda}{2a} \)

Q4. What is the intensity of unpolarised light after passing through a single polaroid, if the initial intensity is \( I_0 \)?

  • A. \( \frac{I_0}{2} \)
  • B. \( I_0 \)
  • C. \( \frac{I_0}{4} \)
  • D. \( 0 \)

Q5. What is the nature of unpolarized light?

  • A. Oscillates in one direction
  • B. Longitudinal
  • C. Stationary
  • D. Randomly oscillating in all transverse directions

+ 5 more questions in the actual test

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