NEET Physics: Wave Optics — MCQ Test 8

Q6. What is the wavelength of light in a medium with refractive index 1.4 if its wavelength in air is \( 560 \, \text{nm} \)?

Q7. What is the wavelength of light in water if its wavelength in air is \( 600 \, \text{nm} \) and the refractive index of water is 1.33?

Q8. What is the distance of the first dark fringe from the central maximum in a double-slit experiment if \( \lambda = 540 \, \text{nm} \), \( d = 0.2 \, \text{mm} \), and \( D = 1.6 \, \text{m} \)?

Q9. In a double-slit experiment, if the screen is moved closer to the slits, what happens to the fringe width?

Q10. What is the condition for the first secondary maximum in a single-slit diffraction pattern?

NEET Physics — Wave Optics

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Medium

What is the shape of the wavefront produced by a point source in a uniform 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 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 Wavefront, Produced, Experiment, Separation, Wavelength, and Intensity.

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 is the shape of the wavefront produced by a point source in a uniform medium?

  • A. Spherical
  • B. Plane
  • C. Cylindrical
  • D. Elliptical

Q2. In Young’s double-slit experiment, if the slit separation is \( 0.25 \, \text{mm} \), the screen is \( 1.0 \, \text{m} \) away, and the fringe width is \( 2.4 \, \text{mm} \), what is the wavelength of light?

  • A. 600 nm
  • B. 500 nm
  • C. 650 nm
  • D. 700 nm

Q3. What is the intensity of light after passing through two polaroids with pass-axes at \( 30^\circ \), if the initial unpolarized intensity is \( I_0 \)?

  • A. \( \frac{I_0}{4} \)
  • B. \( \frac{3I_0}{8} \)
  • C. \( \frac{I_0}{2} \)
  • D. \( I_0 \)

Q4. What is the resultant amplitude of two coherent waves of amplitude \( a \) with a phase difference of \( 3\pi \)?

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

Q5. What is the resultant amplitude of two coherent waves of amplitude \( a \) with a phase difference of \( 2\pi \)?

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

+ 5 more questions in the actual test

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