NEET Physics: Wave Optics — MCQ Test 3

Q6. What is the angular position of the second minimum in a single-slit diffraction pattern if the slit width is \( 3.0 \, \mu\text{m} \) and the wavelength is \( 600 \, \text{nm} \)?

Q7. Why does light exhibit both interference and diffraction despite traveling in straight lines in everyday observations?

Q8. What is the phase difference corresponding to a path difference of \( 9\lambda/4 \) in a double-slit experiment?

Q9. What is the phase difference corresponding to a path difference of \( 5\lambda/8 \) in a double-slit experiment?

Q10. What is the frequency of light with a wavelength of \( 540 \, \text{nm} \) in air, given the speed of light in air is \( 3.0 \times 10^8 \, \text{m/s} \)?

Q11. What is the wavelength of light in a medium with refractive index 1.75 if its wavelength in vacuum is \( 700 \, \text{nm} \)?

Q12. What is the direction of rays relative to the wavefront in a light wave?

Q13. What is the intensity of two incoherent light sources each of intensity \( I_0 \) when combined at a point?

Q14. What is the intensity at a point in a double-slit experiment where the phase difference is \( \pi/2 \), if the maximum intensity is \( 4I_0 \)?

Q15. What is the wavelength of light in a medium with refractive index 1.2 if its wavelength in vacuum is \( 600 \, \text{nm} \)?

NEET Physics — Wave Optics

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Medium

What happens to the wavelength of light when it enters a denser medium?

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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 15 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 Wavelength, Entering, Intensity, Difference, Coherent, and Resulting.

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 wavelength of light when it enters a denser medium?

  • A. Increases
  • B. Remains the same
  • C. Becomes zero
  • D. Decreases

Q2. Why does the wave model predict that light bends away from the normal when entering a rarer medium?

  • A. Amplitude increases
  • B. Frequency decreases
  • C. Wavelength remains constant
  • D. Speed increases

Q3. Why does the intensity of light not depend on its speed when it enters a denser medium?

  • A. Frequency increases
  • B. Wavelength remains constant
  • C. Amplitude determines intensity
  • D. Speed equals frequency

Q4. What is the phase difference between two coherent waves resulting in destructive interference?

  • A. \( 0 \)
  • B. \( \pi/2 \)
  • C. \( \pi \)
  • D. \( 2\pi \)

Q5. What is the path difference for the second dark fringe in a double-slit experiment?

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

+ 10 more questions in the actual test

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