This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Frequency = 9.25x10$^{25}$ HzWavelength =? A) 3.24E-18. B) 3.09E+17. C) 2.77E+34. D) 6.13E-08. Show Answer Correct Answer: A) 3.24E-18. 2. ..... carry the greatest amount of energy. A) Infrared rays. B) Visible light. C) Gamma rays. D) X-rays. Show Answer Correct Answer: C) Gamma rays. 3. All electromagnetic waves travel at the speed of light. Is this statement true or false? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 4. EM waves consist of changing electric and magnetic fields moving perpendicular with respect to each other. What kind of wave is it? A) Longitudinal waves. B) Transverse waves. C) Mechanical waves. D) Compressional waves. Show Answer Correct Answer: B) Transverse waves. 5. Light bouncing off of an object: A) Reflection. B) Refraction. C) Diffraction. D) Rarefraction. Show Answer Correct Answer: A) Reflection. 6. Infrared rays are important for A) Warming the Earth. B) Providing visible light for plants. C) Taking X-rays. D) All of these. Show Answer Correct Answer: A) Warming the Earth. 7. The area of a longitudinal wave where particles are pushed close together are called: A) Rarefactions. B) Compressions. C) Amplitude. D) Wavelength. Show Answer Correct Answer: B) Compressions. 8. What type of wave is responsible for the transfer of electric and magnetic energy through the vacuum of space? A) Radio waves. B) Microwaves. C) Visible light. D) Electromagnetic waves. Show Answer Correct Answer: D) Electromagnetic waves. 9. When using scientific notation, a positive exponent means ..... A) The standard number is greater than one. B) The standard number is less than one. C) The negative sign doesn't have a meaning. D) None of the above. Show Answer Correct Answer: A) The standard number is greater than one. 10. Which application relies on gamma rays? A) X ray imaging. B) Cancer treatments that kill of cancer cells. C) GPS mapping city streets. D) Bluetooth phone connections. Show Answer Correct Answer: B) Cancer treatments that kill of cancer cells. 11. What is the fourth highest electromagnetic wave on the electromagnetic spectrum? A) Microwave. B) Visible Light. C) Ultraviolet. D) Infrared. Show Answer Correct Answer: B) Visible Light. 12. A thermogram identifies the warm and cool parts of an object by using ..... A) Infrared rays. B) Visible light. C) Ultraviolet rays. D) Radio waves. Show Answer Correct Answer: A) Infrared rays. 13. What is the frequency that human eye can detect on EM? A) Radio waves. B) X-rays. C) Ultraviolet rays. D) Visible light. Show Answer Correct Answer: D) Visible light. 14. They are materials that do not transmit any light. A) Opaque. B) Translucent. C) Transparent. D) Reflective. Show Answer Correct Answer: A) Opaque. 15. X-ray photographs show softer tissues ..... A) As dark, highly exposed areas. B) As bright white areas. C) As invisible. D) The same as dense bones. Show Answer Correct Answer: A) As dark, highly exposed areas. 16. Wave with the longest wavelength A) Microwave. B) Radio. C) Gamma. D) Visible light. Show Answer Correct Answer: B) Radio. 17. Which type of electromagnetic wave is most harmful to human skin? A) Infrared radiation. B) Ultraviolet light. C) Visible light. D) Radio waves. Show Answer Correct Answer: B) Ultraviolet light. 18. Which electromagnetic waves are useful for Television? A) Gamma. B) X ray. C) Radio. D) Microwave. Show Answer Correct Answer: C) Radio. 19. Radar uses which type of electromagnetic waves to detect objects & measure their distance and speed? A) Microwaves. B) Infrared rays. C) X-rays. D) None of the above. Show Answer Correct Answer: A) Microwaves. 20. Polarized sunglasses work by A) Blocking light waves that vibrate in one plane. B) Gradually refracting light as it passes through the lenses. C) Bending light as it passes from air into the lenses. D) Reflecting most of the light that strikes the sunglasses. Show Answer Correct Answer: A) Blocking light waves that vibrate in one plane. 21. Microwaves are ..... with wavelengths less than 30 cm and higher frequency & shorter wavelength. A) Computer sounds. B) Sound waves. C) Radio waves. D) Hand signals. Show Answer Correct Answer: C) Radio waves. 22. What type of electromagnetic wave is used in fiber optic communications? A) Radio waves. B) Microwaves. C) Infrared waves. D) Ultraviolet waves. Show Answer Correct Answer: C) Infrared waves. 23. The electric and magnetic fields vibrate at right angles to the direction the wave travels so it is a transverse wave. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 24. Electromagnetic waves are examples of A) Transverse waves. B) Longitudinal waves. C) Mechanical waves. D) Ocean waves. Show Answer Correct Answer: A) Transverse waves. 25. Sunscreen protects you from sunburns. What type of electromagnetic wave causes sunburns? A) Infared. B) Gamma. C) Ultraviolet. D) Visible Light. Show Answer Correct Answer: C) Ultraviolet. ← PreviousNext →Related QuizzesClass 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 1Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 2Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 3Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 4Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 5Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 6Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 7Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 8Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 9Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books