NEET Physics: Wave Optics — MCQ Test 17

Q6. What is the frequency of light with a wavelength of \( 680 \, \text{nm} \) in air, given the speed of light in air is \( 3.0 \times 10^8 \, \text{m/s} \)?

Q7. Why does the angle of refraction increase beyond 90° become impossible when light moves from a denser to a rarer medium?

Q8. What is the fringe width in a double-slit experiment if \( \lambda = 590 \, \text{nm} \), \( d = 0.25 \, \text{mm} \), and \( D = 1.2 \, \text{m} \)?

Q9. What ensures that light rays appear to travel in straight lines despite their wave nature?

Q10. What property of light waves is responsible for the redistribution of energy into bright and dark regions during diffraction?

NEET Physics — Wave Optics

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What is the frequency of light with a wavelength of \( 460 \, \text{nm} \) in air, given the speed of light in air is \( 3.0 \times 10^8 \, \text{m/s} \)?

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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 Frequency, Wavelength, Determines, Intensity, Refractive, and Transmitted.

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 frequency of light with a wavelength of \( 460 \, \text{nm} \) in air, given the speed of light in air is \( 3.0 \times 10^8 \, \text{m/s} \)?

  • A. \( 5.26 \times 10^{14} \, \text{Hz} \)
  • B. \( 6.52 \times 10^{14} \, \text{Hz} \)
  • C. \( 4.41 \times 10^{14} \, \text{Hz} \)
  • D. \( 5.88 \times 10^{14} \, \text{Hz} \)

Q2. What determines the intensity of light in the wave picture?

  • A. Frequency
  • B. Wavelength
  • C. Speed
  • D. Square of the amplitude

Q3. What is the speed of light in a medium with refractive index 1.8, given the speed in vacuum is \( 3.0 \times 10^8 \, \text{m/s} \)?

  • A. \( 1.67 \times 10^8 \, \text{m/s} \)
  • B. \( 2.0 \times 10^8 \, \text{m/s} \)
  • C. \( 1.5 \times 10^8 \, \text{m/s} \)
  • D. \( 3.0 \times 10^8 \, \text{m/s} \)

Q4. Why does the intensity of light transmitted through two polaroids become zero when their axes are at 90° to each other?

  • A. Wavelength doubles
  • B. Electric field component is blocked
  • C. Frequency decreases
  • D. Amplitude increases

Q5. What is the refractive index of a medium if the speed of light in it is \( 2.5 \times 10^8 \, \text{m/s} \) and in vacuum is \( 3.0 \times 10^8 \, \text{m/s} \)?

  • A. 1.5
  • B. 1.3
  • C. 1.2
  • D. 1.6

+ 5 more questions in the actual test

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