This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part Ii) Chapter 10 Wave Optics – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Diffraction effects show that light does not travel in straight lines. Under what condition the concepts of ray optics are valid. ( D = distance of screen from the slit). A) D < Zf. B) D = Zf. C) D > Zf. D) D << Zf. Show Answer Correct Answer: D) D << Zf. 2. In a double-slit interference experiment you areasked to use laser light of different wavelengths anddetermine the separation between adjacent maxima.You observe that this separation is greatest when youilluminate the double slit with ..... A) Blue light. B) Green light. C) Yellow light. D) Red light. Show Answer Correct Answer: D) Red light. 3. Newton's Rings are produced by A) Polarization of light. B) Interference of light. C) Reflection. D) Refraction. Show Answer Correct Answer: B) Interference of light. 4. What electromagnetic wave travels the fastest? A) Microwave. B) Ultraviolet. C) Xray. D) All travel at the speed of light 'c'. Show Answer Correct Answer: D) All travel at the speed of light 'c'. 5. In youngs double slit experiment if entire apparatus is immersed in water the fridge width would A) Decrease. B) Increase. C) Not change. D) None of the above. Show Answer Correct Answer: A) Decrease. 6. A binary star is observed with a telescope. A coloured filter is used to maximise the resolution. (A filter of a given colour transmits only that colour of light). What colour filter would give the greatest increase in the resolution? A) Blue. B) Green. C) Yellow. D) Red. Show Answer Correct Answer: A) Blue. 7. Property of light wave does not change on change in medium A) Speed. B) Wavelength. C) Frequency. D) Amplitude. Show Answer Correct Answer: C) Frequency. 8. In Fraunhofer diffraction, the source and screen are: A) Very close to the slit. B) Placed inside a vacuum chamber. C) At a finite distance from the slit. D) Effectively at infinity or collimated using lenses. Show Answer Correct Answer: D) Effectively at infinity or collimated using lenses. 9. If plane mirror is used in place of glass plate in Newton's Ring experiment- A) Multicolour fringes are seen. B) Only bright fringes are seen. C) No fringes are seen. D) Only dark fringes are seen. Show Answer Correct Answer: C) No fringes are seen. 10. In a Young's double slit experiment, the source is white light. One of the holes is covered by a red filter and another by a blue filter. In this case there shall A) There shall be alternate interference patterns of red and blue. B) There shall be an interference pattern for red distinct from thatfor blue. C) There shall be no interference fringes. D) There shall be an interference pattern for red mixing with onefor blue. Show Answer Correct Answer: C) There shall be no interference fringes. 11. In Young's double slit experiment the separation between the slits is halved and distance between slits and screen is doubled. The width is A) Unchanged. B) Halved. C) Doubled. D) Quadrupled. Show Answer Correct Answer: D) Quadrupled. 12. Two light sources are said to be coherent if they A) Are of the same frequency. B) Are of the same frequency, and maintain a constant phase difference. C) Are of the same amplitude, and maintain a constant phase difference. D) Are of the same frequency and amplitude. Show Answer Correct Answer: B) Are of the same frequency, and maintain a constant phase difference. 13. The intensity of light issuing out of two slits in young's experiment is in ratio 1:4. The intensity of the minimum to the maximum will be in the ratio A) 1:2. B) 1:4. C) 1:9. D) None of the above. Show Answer Correct Answer: B) 1:4. 14. A laboratory experiment produces a double-slit interference pattern on a screen. If the screen is moved farther away from the slits, the fringes will be A) Closer together. B) In the same positions. C) Further Apart. D) Fuzzy and out of focus. Show Answer Correct Answer: C) Further Apart. 15. Velocity= 600 m/sWavelength= 2.0mFrequency= ..... A) 300 hertz. B) .0033 hertz. C) 3000 hertz. D) None of the above. Show Answer Correct Answer: A) 300 hertz. 16. Which of the following phenomena cannot be explained by the wave theory of light? A) Diffraction. B) Polarization. C) Interference. D) Photoelectric effect. Show Answer Correct Answer: D) Photoelectric effect. 17. In a Young's double slit experiment, the separation between the slits is 0.1 mm, the wavelength of light used is 600 nm and the interference pattern is observed on a screen 1m away. Find the separation between bright fringes. A) (a) 6.6 mm. B) (b) 6.0 mm. C) (c) 6 m. D) D) 60cm. Show Answer Correct Answer: B) (b) 6.0 mm. 18. A student holds a laser and diffraction grating such that they are projecting a series of bright and dark fringes onto the whiteboard. As the student walks toward the board, the bright spots ..... A) Become closer together. B) Moves farther apart. C) Maintain the same spacing. D) None of the above. Show Answer Correct Answer: A) Become closer together. 19. In a double-slit experiment, what happens to the interference pattern if the light source is changed to a monochromatic source? A) The pattern becomes more distinct. B) The pattern remains unchanged. C) The pattern disappears. D) The pattern becomes less distinct. Show Answer Correct Answer: A) The pattern becomes more distinct. 20. A wave front is surface of constant ..... A) Phase. B) Frequency. C) Wavelength. D) Amplitude. Show Answer Correct Answer: A) Phase. 21. The number of cycles occurring in a certain amount of time in a certain wave is defined as a wave's ..... A) Wavelength. B) Period. C) Amplitude. D) Frequency. Show Answer Correct Answer: D) Frequency. 22. Destructive interference results when a trough meets the trough of another wave. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 23. In Young's double-slit experiment, if the separation between the slits is doubled, the fringe width: A) Doubles. B) Becomes half. C) Becomes four times. D) Remains the same. Show Answer Correct Answer: B) Becomes half. 24. In YDSE two slits are made 5 mm apart and the screen is placed 2 m away. What is the fringe separation when light of wavelength 500 nm is used A) 0.002 mm. B) 0.02 mm. C) 0.2 mm. D) 2 mm. Show Answer Correct Answer: C) 0.2 mm. 25. Relation between phase difference and path difference is A) $x=\frac{2\pi}{\lambda}\phi$. B) $x=\frac{\lambda}{2\pi}\phi$. C) $x=\frac{\phi}{2\pi\lambda}$. D) $x=\frac{2\pi\lambda}{\phi}$. Show Answer Correct Answer: B) $x=\frac{\lambda}{2\pi}\phi$. ← PreviousNext →Related QuizzesClass 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 1Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 2Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 3Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 4Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 5Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 6Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 7Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 8Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 9Class 12 Physics (Part Ii) Chapter 10 Wave Optics Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books