This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 18 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What tools are needed to measure the speed of light? A) A pencil, glass of water, and oil or sugar. B) A light source, a mirror, and vacuum. C) Lanterns and a smart mind!. D) A light source, a mirror, and a gear wheel, and an observer. Show Answer Correct Answer: D) A light source, a mirror, and a gear wheel, and an observer. 2. Describe how lasers utilize the principles of polarization. A) Lasers emit polarized light by aligning the electric field vectors of photons, using optical components to control polarization. B) Lasers produce unpolarized light by scattering photons randomly. C) Lasers emit light in all directions without any polarization control. D) Lasers use polarization to amplify sound waves instead of light. Show Answer Correct Answer: A) Lasers emit polarized light by aligning the electric field vectors of photons, using optical components to control polarization. 3. Electromagnetic waves travel at a constant velocity of 3 x 10$^{8 }$m/s in a vacuum. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 4. The EM wave with frequency higher than infrared and lower than UV. A) Radio. B) Visible light. C) Xray. D) Gamma. Show Answer Correct Answer: B) Visible light. 5. Identify the fields produced by a moving charged particle. A) Both an electric field and a magnetic field will be produced. B) Neither a magnetic field nor an electric field will be produced. C) A magnetic field, but no electric field will be produced. D) Only the electric field, but no magnetic field will be produced. Show Answer Correct Answer: A) Both an electric field and a magnetic field will be produced. 6. Electromagnetic wave with a wavelength between about 10 billionths of a meter and 10 trillionths of a meter, often used for medical imaging A) X-ray. B) Gamma ray. C) Ultraviolet waves. D) Visible light. Show Answer Correct Answer: A) X-ray. 7. What do far infrared waves give off? A) Light. B) Cold. C) Heat. D) Sound. Show Answer Correct Answer: C) Heat. 8. Which of the following waves are used in medical imaging and treatment ..... A) Micro waves. B) Radio waves. C) X-rays. D) Infrared light. Show Answer Correct Answer: C) X-rays. 9. When an electron moves from an excited state back to its normal energy level, it creates a disturbance in the magnetic field around it and makes what? (Vocab) A) Gravity Wave. B) Permanent Magnet. C) Electromagnetic Wave. D) Electromagnet. E) Electric Motor. Show Answer Correct Answer: C) Electromagnetic Wave. 10. The entire range of the electromagnetic wave frequencies is known as ..... A) Ultraviolet radiation. B) Visible light. C) The electromagnetic spectrum. D) Magnetism. Show Answer Correct Answer: C) The electromagnetic spectrum. 11. Which of the following experiments demonstrated the wave nature of electromagnetic radiation? A) Rutherford's gold foil experiment. B) Young's double-slit experiment. C) Millikan's oil drop experiment. D) Thomson's cathode ray experiment. Show Answer Correct Answer: B) Young's double-slit experiment. 12. Identify the fields that make up an electromagnetic wave. A) Both an electric field and a magnetic field. B) Neither a magnetic field nor an electric field. C) Only a magnetic field, but no electric field. D) Only an electric field, but no magnetic field. Show Answer Correct Answer: A) Both an electric field and a magnetic field. 13. In order of the light transmitting capabilities of materials from none to all, which is the correct sequence? A) Transparent, opaque, translucent. B) Translucent, transparent, opaque. C) Opaque, translucent, transparent. D) Opaque, transparent, translucent. Show Answer Correct Answer: C) Opaque, translucent, transparent. 14. Which of these mediums does light travel through the easiest? A) Gas. B) Liquid. C) Solid. D) None of the above. Show Answer Correct Answer: A) Gas. 15. The measure from crest to crest OR trough to trough is the ..... A) Frequency. B) Rest. C) Amplitude. D) Wavelength. Show Answer Correct Answer: D) Wavelength. 16. ..... contributes primarily to greenhouse effect. Other greenhouse gases include methane, nitrous oxide, fluorinated gases, etc. A) Carbon dioxide. B) Sunlight. C) Oxygen. D) Hydrogen. Show Answer Correct Answer: A) Carbon dioxide. 17. Thomas Young (1801) showed that A) Light is a wave trough experiment on interference of light. B) Light is an electromagnetic. C) Light is a particle. D) None of the above. Show Answer Correct Answer: A) Light is a wave trough experiment on interference of light. 18. EM waves also all travel at relatively the same speed when they travel through a vacuum. That speed is commonly referred to as the ..... , which measures ..... A) Speed of light; frequency. B) Speed of sound; wavelength. C) Speed of light; wavelength. D) Speed of sound; frequency. Show Answer Correct Answer: A) Speed of light; frequency. 19. Electromagnetic waves A) Need a medium to travel through. B) Can travel through a vacuum. C) All the above. D) None of the above. Show Answer Correct Answer: B) Can travel through a vacuum. 20. What type of electromagnetic waves is used in the airport to check on the luggage? A) Gamma ray. B) X-ray. C) Infrared ray. D) Radio wave. Show Answer Correct Answer: B) X-ray. 21. When an electron returns to ground state from an excited state, the atom will A) Emit energy. B) Absorb energy. C) Rotate. D) Wiggle. Show Answer Correct Answer: A) Emit energy. 22. *Maxwell calculated the speed of light to be A) $3x10^8m/s.$. B) $3x10^4m/s.$. C) Speed of sound. D) Fluctuating based on the temprature. Show Answer Correct Answer: A) $3x10^8m/s.$. 23. A gamma ray photon and a microwave photon are traveling in a vacuum. Compared to the wavelength and energy of the gamma ray photon, the microwave photon has a ..... ? A) Shorter wavelength and less energy. B) Shorter wavelength and more energy. C) Longer wavelength and less energy. D) Longer wavelength and more energy. Show Answer Correct Answer: C) Longer wavelength and less energy. 24. Which of the following statements about electromagnetic waves is INCORRECT? A) They are all transverse waves. B) They all travel at 300 m/s through space. C) They are the only types of wave that can travel through space. D) They all transfer energy without transferring matter. Show Answer Correct Answer: B) They all travel at 300 m/s through space. 25. Electromagnetic waves that you can see A) Radio waves. B) Visible light. C) X-rays. D) Ultraviolet rays. Show Answer Correct Answer: B) Visible light. ← 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