NEET Physics: Wave Optics — MCQ Test 1

Q6. What is the nature of the interference pattern formed by incoherent sources?

Q7. What determines the visibility of interference fringes when light passes through two slits?

Q8. In a single-slit diffraction pattern, what happens to the central maximum’s width if the slit width is tripled?

Q9. What happens to the central maximum’s width in a single-slit diffraction pattern if the slit width is reduced to half?

Q10. What distinguishes the interference pattern of a double-slit experiment from the diffraction pattern of a single slit?

Q11. What is the frequency of light with a wavelength of \( 480 \, \text{nm} \) in air, given the speed of light in air is \( 3.0 \times 10^8 \, \text{m/s} \)?

Q12. What is the refractive index of a medium if the speed of light in it is \( 2.25 \times 10^8 \, \text{m/s} \) and in vacuum is \( 3.0 \times 10^8 \, \text{m/s} \)?

Q13. What is the shape of the wavefront emitted by a point source at a large distance?

Q14. What fundamental principle allows the prediction of a new wavefront’s shape from a known wavefront using secondary wavelets?

Q15. What is the distance of the fifth dark fringe from the central maximum in a double-slit experiment if \( \lambda = 650 \, \text{nm} \), \( d = 0.5 \, \text{mm} \), and \( D = 1.0 \, \text{m} \)?

NEET Physics — Wave Optics

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What is the intensity of light transmitted through two polaroids with their pass-axes at \( 45^\circ \) to each other, if the initial intensity after the first polaroid is \( I_0 \)?

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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 Intensity, Transmitted, Polaroids, Polaroid, Amplitude, and Resultant.

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 intensity of light transmitted through two polaroids with their pass-axes at \( 45^\circ \) to each other, if the initial intensity after the first polaroid is \( I_0 \)?

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

Q2. What is the amplitude of the resultant wave when two coherent waves of amplitude \( a \) interfere with a phase difference of \( \pi/2 \)?

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

Q3. What is the path difference for the seventh bright fringe in a double-slit experiment?

  • A. \( 6\lambda \)
  • B. \( 7\lambda \)
  • C. \( \frac{13\lambda}{2} \)
  • D. \( 5\lambda \)

Q4. Why does total internal reflection occur only when light travels from a denser to a rarer medium?

  • A. Light’s amplitude increases
  • B. Wavelength doubles
  • C. Critical angle exists in denser medium
  • D. Frequency changes

Q5. What prevents the formation of an interference pattern when two independent light sources are used?

  • A. Different amplitudes
  • B. Lack of coherence
  • C. Unequal wavelengths
  • D. Speed variation

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