This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 16 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which type of electromagnetic radiation is used extensively in communications? A) Radio waves. B) Gamma rays. C) Infrared rays. D) X-rays. Show Answer Correct Answer: A) Radio waves. 2. A black shirt will look black to our eyes because ..... A) All the visible light colors are being absorbed and nothing is being reflected back to our eyes. B) Black is the only color absorbed by the shirt. C) All the above. D) None of the above. Show Answer Correct Answer: A) All the visible light colors are being absorbed and nothing is being reflected back to our eyes. 3. Earth's atmosphere blocks short wavelengths of the electromagnetic spectrum. Which telescopes must be placed in orbit around Earth in order to observe short-wavelength radiation? A) Gamma-ray telescopes. B) Visible-light telescopes. C) Infrared telescopes. D) Radio telescopes. Show Answer Correct Answer: A) Gamma-ray telescopes. 4. Convert this number into scientific notation:950, 000 A) 9.5 x 10$^{5}$. B) 9.5 x 10$^{-9}$. C) 9.5 x 10$^{2}$. D) None of the above. Show Answer Correct Answer: A) 9.5 x 10$^{5}$. 5. White light is the entire range of A) Colorsof visible light combined. B) Ultravioletlight. C) Gammarays and X rays. D) EMwaves. Show Answer Correct Answer: A) Colorsof visible light combined. 6. The wave equation is ..... A) V = f $\lambda$. B) $\lambda$ = v / f. C) F = v / $\lambda$. D) All of them. Show Answer Correct Answer: A) V = f $\lambda$. 7. How are infrared waves classified? A) Hot and cold infrared. B) Visible and invisible infrared. C) Near and far infrared. D) Short and long infrared. Show Answer Correct Answer: C) Near and far infrared. 8. Which type of wave does NOT require a medium to travel? A) Sound wave. B) Water wave. C) Electromagnetic wave. D) Seismic wave. Show Answer Correct Answer: C) Electromagnetic wave. 9. Which of the following types of electromagnetic waves have the shortest wavelength? A) Infrared waves. B) X-rays. C) Radio waves. D) Ultraviolet waves. Show Answer Correct Answer: B) X-rays. 10. The electromagnetic waves with the highest frequencies are called A) Radio waves. B) Gamma rays. C) X-rays. D) Visible light. Show Answer Correct Answer: B) Gamma rays. 11. Which of the following electromagnetic waves travels the fastest? A) Gamma rays. B) Radio waves. C) Ultraviolet waves. D) They all travel the same speed. Show Answer Correct Answer: D) They all travel the same speed. 12. Which of the following is not an application of microwaves? A) Cellphone. B) Radio. C) Radar. D) Microwave oven. Show Answer Correct Answer: B) Radio. 13. Which statement best describes what waves are? A) Wavy lines on graph paper. B) Disturbances that transfer energy. C) Light energy that changes particles of matter. D) Circles that move out from a central place. Show Answer Correct Answer: B) Disturbances that transfer energy. 14. What are electromagnetic waves grouped by? A) Their function. B) Wavelength and frequency. C) Wavelength. D) Frequency. Show Answer Correct Answer: B) Wavelength and frequency. 15. Describe how the energy level changes from gamma rays to radio waves. A) Increases. B) Decreases. C) Remain the same. D) Cannot be determined. Show Answer Correct Answer: B) Decreases. 16. What happens when electric and magnetic fields change? A) A changing magnetic field creates the same electric field. B) A changing magnetic field creates a changing electric field. C) A changing magnetic field creates a burning fire field. D) None of the above. Show Answer Correct Answer: B) A changing magnetic field creates a changing electric field. 17. ..... waves have the highest frequency among electromagnetic waves. A) Gamma rays. B) X-rays. C) Microwaves. D) Ultraviolet rays. Show Answer Correct Answer: A) Gamma rays. 18. During a concert, how does the sound from the instruments reach the audience? A) Through the air as a medium. B) Sound is unrelated to the vibrations of the instruments. C) Sound cannot travel through the concert hall's atmosphere. D) Sound can travel even in the vacuum of space. Show Answer Correct Answer: A) Through the air as a medium. 19. An electromagnetic consists of an electric field and a magnetic field. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 20. Which electromagnetic wave is used in medical imaging to view bones? A) Ultraviolet wave. B) X-ray. C) Gamma ray. D) Visible light. Show Answer Correct Answer: B) X-ray. 21. What is the nature of light? A) Particle. B) Wave. C) Both particle and wave. D) None of the above. Show Answer Correct Answer: C) Both particle and wave. 22. A prism splits white light into 7 constituent colours. In what order does this process take place? A) Refraction when white light enters the prism and dispersion when it exits the prism. B) Dispersion when the light enters the prism and refraction when it exits the prism. C) Both refraction and dispersion happen at both points-entry and exit of light from the prism. D) None of the above. Show Answer Correct Answer: B) Dispersion when the light enters the prism and refraction when it exits the prism. 23. The color most closely associated with a high frequency A) Blue. B) Red. C) Yellow. D) Orange. Show Answer Correct Answer: A) Blue. 24. Rattlesnakes need to catch preys at night. What type of waves would their eyes need to see? A) Infrared light. B) Gamma rays. C) Radio waves. D) Visible light. Show Answer Correct Answer: A) Infrared light. 25. Which of the following is a use of microwaves? A) Remote controls. B) Bluetooth headsets. C) Power generation. D) Water purification. Show Answer Correct Answer: B) Bluetooth headsets. ← 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