NEET Physics: Wave Optics — MCQ Test 16

Q6. What is the direction of energy propagation relative to the wavefront in a light wave?

Q7. In a double-slit experiment, if \( \lambda = 530 \, \text{nm} \), \( d = 0.15 \, \text{mm} \), and \( D = 1.8 \, \text{m} \), what is the fringe width?

Q8. What happens to the fringe width in a double-slit experiment if the slit separation is halved?

Q9. Why does the interference pattern from two slits require light to originate from a single source?

Q10. What is the shape of the wavefront from a distant star intercepted by Earth?

NEET Physics — Wave Optics

Free MCQ Test 16 of 22

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Why does the wave theory of light predict that the speed of light decreases when it bends towards the normal during refraction?

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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 Decreases, Refraction, Struggle, Propagation, Difference, and Corresponding.

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. Why does the wave theory of light predict that the speed of light decreases when it bends towards the normal during refraction?

  • A. Light slows down in a denser medium
  • B. Light speeds up in a denser medium
  • C. Light’s frequency increases
  • D. Light’s amplitude decreases

Q2. Why does the wave theory struggle to explain the propagation of light through a vacuum?

  • A. Light has no frequency in vacuum
  • B. Waves typically need a medium
  • C. Light’s amplitude decreases
  • D. Vacuum increases light’s speed

Q3. What is the phase difference corresponding to a path difference of \( 2\lambda \) in a double-slit experiment?

  • A. \( 2\pi \)
  • B. \( \pi \)
  • C. \( 4\pi \)
  • D. \( \frac{3\pi}{2} \)

Q4. What is the resultant amplitude when two coherent waves of amplitude \( a \) interfere with a phase difference of \( \pi \)?

  • A. \( 2a \)
  • B. \( a\sqrt{2} \)
  • C. \( 0 \)
  • D. \( a \)

Q5. What is the speed of light in glass if its refractive index is 1.6 and the speed of light in vacuum is \( 3.0 \times 10^8 \, \text{m/s} \)?

  • A. \( 1.875 \times 10^8 \, \text{m/s} \)
  • B. \( 2.0 \times 10^8 \, \text{m/s} \)
  • C. \( 1.5 \times 10^8 \, \text{m/s} \)
  • D. \( 3.0 \times 10^8 \, \text{m/s} \)

+ 5 more questions in the actual test

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