This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Physics Part I > 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 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Wavelength = 3m Frequency = 6 HzSpeed =? A) 18 m/s. B) 2 m/s. C) 9 m/s. D) 1/2 m/s. Show Answer Correct Answer: A) 18 m/s. 2. Which of the following is correctly arranged from longest to shortest wavelength? A) Microwave, x-ray, gamma ray. B) X-ray, gamma ray, ultraviolet. C) Ultraviolet, visible light, radio wave. D) Gamma ray, radio wave, infrared. Show Answer Correct Answer: A) Microwave, x-ray, gamma ray. 3. Do all electromagnetic waves travel at the same speed? A) No, the waves travel at different speeds. B) No, the speeds of electromagnetic waves constantly change. C) Yes, the speeds of electromagnetic waves differ. D) Yes, all electromagnetic waves travel at the same speed. Show Answer Correct Answer: D) Yes, all electromagnetic waves travel at the same speed. 4. Light is emitted when electrons A) Collide with one another, releasing energy. B) Move from a higher energy level to a lower energy level. C) Move from a lower energy level to a higher energy level. D) Move from one atom to another. Show Answer Correct Answer: B) Move from a higher energy level to a lower energy level. 5. How does melanin provide protection against skin cancer? A) Melanin reflects all types of light. B) Melanin transmits harmful lightwaves before they reach the genetic material. C) Melanin absorbs harmful lightwaves before they reach the genetic material. D) Melanin does not provide protection against skin cancer. Show Answer Correct Answer: C) Melanin absorbs harmful lightwaves before they reach the genetic material. 6. Which color of light is produced when all of the colors of visible light in the electromagnetic spectrum are combined? A) Gray. B) White. C) Black. D) None of the above. Show Answer Correct Answer: B) White. 7. Describe the electromagnetic spectrum and its components. A) The electromagnetic spectrum consists of radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. B) Sound waves, light waves, and heat waves. C) Radio waves, sound waves, and thermal radiation. D) Only visible light and infrared radiation. Show Answer Correct Answer: A) The electromagnetic spectrum consists of radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. 8. A(n) ..... is the substance or matter through which waves pass. A) Compression. B) Rarefaction. C) Hertz. D) Medium. Show Answer Correct Answer: D) Medium. 9. The light we can see. A) Visible. B) Gamma. C) Ultraviolet. D) None of the above. Show Answer Correct Answer: A) Visible. 10. A sound wave needs a medium to travel (to be transmitted) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. What type of electromagnetic wave is used in MRI machines to create detailed images of organs and tissues? A) Infrared waves. B) Radio waves. C) Ultrasound. D) X-rays. Show Answer Correct Answer: B) Radio waves. 12. The formula for time period of a wave is ..... A) T=1/v. B) T= 1/c. C) T= 1/f. D) None of these. Show Answer Correct Answer: C) T= 1/f. 13. Longer wavelengths are associated with A) Lower energy. B) Higher energy. C) Zero energy. D) All of these. Show Answer Correct Answer: A) Lower energy. 14. Which type of radio broadcast has a greater broadcast range? A) AM radio waves. B) FM radio waves. C) Visible light. D) Infrared waves. Show Answer Correct Answer: A) AM radio waves. 15. Unlike a transverse wave, the disturbance in a longitudinal wave is A) In a circular motion. B) Parallel to the wave motion. C) Perpendicular to the wave motion. D) In the opposite direction of the wave motion. Show Answer Correct Answer: B) Parallel to the wave motion. 16. Red light has ..... wavelength than green light. A) Lower. B) Greater. C) Same. D) None of the above. Show Answer Correct Answer: B) Greater. 17. Which electromagnetic waves are used in fiber optic communication? A) Radio waves. B) Ultraviolet waves. C) Microwaves. D) Visible light. Show Answer Correct Answer: D) Visible light. 18. Electromagnetic waves with longest wavelengths and lowest frequencies are A) Radio waves. B) Gamma waves. C) Thermowaves. D) Microwaves. Show Answer Correct Answer: A) Radio waves. 19. When an incident ray strikes a particle, it is scattered. Which of the following conditions must be met for scattering of light to happen? A) The diameter of the particle must be greater than the wavelength of the ray. B) The wavelength of the ray and the velocity of the particle must be the same. C) It should be either sunrise or sunset. D) None of the above. Show Answer Correct Answer: A) The diameter of the particle must be greater than the wavelength of the ray. 20. Which phenomenon explains the bending of light as it passes through different media? A) Dispersion. B) Reflection. C) Refraction. D) Diffraction. Show Answer Correct Answer: C) Refraction. 21. Which type of visible light has a longer wavelength, red or blue light. A) Blue light. B) Red light. C) All the above. D) None of the above. Show Answer Correct Answer: B) Red light. 22. What type of electromagnetic wave has a higher frequency than visible light and a larger wavelength than x-rays A) Ultraviolet. B) Gamma. C) Infrared. D) Visible. Show Answer Correct Answer: A) Ultraviolet. 23. Energy carried by an electromagnetic wave is called ..... A) Radiant energy. B) Potential energy. C) Gamma energy. D) Kinetic energy. Show Answer Correct Answer: A) Radiant energy. 24. Human eye can only detect only a small portion of this spectrum called A) Gamma rays. B) Radio waves. C) Visible light. D) Infrared rays. Show Answer Correct Answer: C) Visible light. 25. Which of the following situations would cause light to refract? A) Passing from one glass block to another. B) Moving through the air. C) Moving from air to water. D) Traveling through a vacuum. Show Answer Correct Answer: C) Moving from air to water. 26. Which SI (metric) unit is used for frequency? A) Hertz (Hz). B) Volt (v). C) Newton (N). D) Joule (J). Show Answer Correct Answer: A) Hertz (Hz). 27. Which electromagnetic waves are used in devices such as heat lamps? A) Ultraviolet rays. B) Microwaves. C) Infrared rays. D) None of the above. Show Answer Correct Answer: C) Infrared rays. 28. A radio wave is an example of what type of wave? A) Electromagnetic wave. B) Mechanical wave. C) All the above. D) None of the above. Show Answer Correct Answer: A) Electromagnetic wave. 29. These electromagnetic waves have the lowest frequencies A) Gamma Waves. B) Ultraviolet Waves. C) Infrared Waves. D) Radio Waves. Show Answer Correct Answer: D) Radio Waves. 30. Which EM wave has the highest energy? A) Radio waves. B) Ultraviolet waves. C) X-rays. D) Gamma waves. Show Answer Correct Answer: D) Gamma waves. 31. The waves produced by heat lamps are ..... A) Mechanical. B) Microwaves. C) Infrared. D) X-rays. Show Answer Correct Answer: C) Infrared. 32. Ultraviolet or UV radiation are ..... rays A) Invisible. B) Visible. C) Colourful. D) None of the above. Show Answer Correct Answer: A) Invisible. 33. What type of electromagnetic waves have the most energy? A) Ultraviolet. B) Gamma rays. C) X-Rays. D) Infrared rays. Show Answer Correct Answer: B) Gamma rays. 34. In general, which condition of motion MUST be met with regards to a charged particle if it is in the process of emitting electromagnetic waves? A) Moves at the speed of light. B) Moves at constant velocity. C) Moves in a circle. D) Accelerates. Show Answer Correct Answer: D) Accelerates. 35. Determine the frequency of electromagnetic radiation which would have a wavelength of 1.0 mile (1.6 km).What part of the electromagnetic spectrum does this fall within? (You will need to look at an EM Spectrum to determine). A) Visible light. B) Infrared waves. C) Radio waves. D) Ultraviolet waves. Show Answer Correct Answer: C) Radio waves. 36. To reflect means A) Light bends. B) To bounce off of something. C) To think about something. D) None of the above. Show Answer Correct Answer: B) To bounce off of something. 37. What type of lens is thicker at the edges and thinner in the center? A) Concave lens. B) Bifocal lens. C) Convex lens. D) Cylindrical lens. Show Answer Correct Answer: A) Concave lens. 38. All forms of radiation are harmful. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 39. When an electron is knocked out of a metal due to a high frequency photons being shined on the metal is called ..... A) Photographical Evidence. B) Photoelectric Effect. C) Photon Erosion. D) None of the above. Show Answer Correct Answer: B) Photoelectric Effect. 40. Frequency = 9.25x10$^{25}$ HzEnergy =? A) 7.16E-60. B) 1.40E+59. C) 2.77E+34. D) 6.13E-08. Show Answer Correct Answer: D) 6.13E-08. 41. Which of the following waves are used in nigh vision cameras ..... A) Micro waves. B) Radio waves. C) Infrared light. D) X-rays. Show Answer Correct Answer: C) Infrared light. 42. The higher the frequency the ..... the energy. A) Lower. B) Higher. C) Neither, stays the same. D) None of the above. Show Answer Correct Answer: B) Higher. 43. The portion of the visible spectrum that appears brightest to the human eye isaround 560 nm in wavelength, which corresponds to yellow-green. What is thefrequency of 560 nm light? c = 3 x 10$^{8}$m/s $f=\frac{c}{\lambda}$ A) 5.4 x 10$^{14}$ Hz. B) 6.0 x 10$^{14}$ Hz. C) 4.5 x 10$^{14}$ Hz. D) 1.8 x 10$^{14}$ Hz. Show Answer Correct Answer: A) 5.4 x 10$^{14}$ Hz. 44. Which of the following is not a primary color of light? A) Yellow. B) Blue. C) Green. D) Red. Show Answer Correct Answer: A) Yellow. 45. Which of the following waves has the most energy A) Ultraviolet. B) Visible light. C) Microwave. D) Infrared. Show Answer Correct Answer: A) Ultraviolet. 46. Frequency = 5.00x10$^{7}$ HzWavelength =? A) 1.50E+16. B) 3.31E-26. C) 1.67E-01. D) 6.00E+00. Show Answer Correct Answer: D) 6.00E+00. 47. Which electromagnetic wave has the second highest frequency on the electromagnetic spectrum? A) Ultraviolet. B) Gamma Ray. C) Microwave. D) X-Ray. Show Answer Correct Answer: D) X-Ray. 48. The speed of light (radiation) is ..... km/second. A) 3, 000. B) 300. C) 300, 000. D) None of the above. Show Answer Correct Answer: C) 300, 000. 49. Which of the following is TRUE about the speed of an EM waves? A) They travel in a vacuum at a speed of 3.0 x 10 8 m/s. B) They travel slowest in a vacuum or empty space. C) They travel at the same speed in different media. D) They travel fastest in gases. Show Answer Correct Answer: A) They travel in a vacuum at a speed of 3.0 x 10 8 m/s. 50. What is the lowest point of a wave? A) Trough. B) Crescent. C) Medium. D) None of the above. Show Answer Correct Answer: A) Trough. 51. Heat seeking missiles use ..... electromagnetic technology. A) Gamma. B) Microwave. C) X ray. D) Infrared. Show Answer Correct Answer: D) Infrared. 52. What type of electromagnetic waves cause sunburns? A) Infrared rays. B) Microwaves. C) Ultraviolet. D) Radio waves. Show Answer Correct Answer: C) Ultraviolet. 53. What electromagnetic wave used in diathermy that could treat muscle pains? A) Ultraviolet rays. B) Microwave. C) Infrared. D) Gamma rays. Show Answer Correct Answer: B) Microwave. 54. Based on Maxwell starting pointsElectric field lines: A) Originate on positive charges and terminate on negative charges. B) Originate on negative charges and terminate on positive charges. C) Can be originated on either charges but terminates only on negative charges. D) Form closed loops. Show Answer Correct Answer: A) Originate on positive charges and terminate on negative charges. 55. The electromagnetic spectrum is a continuous range of ..... for electromagnetic radiation. A) Magnestism. B) Light. C) Particles. D) Frequencies. Show Answer Correct Answer: D) Frequencies. 56. A short wavelength is equal to A) A low frequency. B) Slow wave speed. C) A high frequency. D) I do not know and do not wish to answer. Show Answer Correct Answer: C) A high frequency. 57. Exposure to ionizing radiation can cause cancer. A) TRUE. B) FALSE. C) MAYBE. D) None of the above. Show Answer Correct Answer: A) TRUE. 58. Satellite Communication It is used to broadcast information over significantly large distances with the help of satellites. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 59. When light hits something, that light can do what three things? A) Absorb, Reflect, and Transmit. B) Refract, Absorb, and Dissolve. C) Reflect, Absorb, and Rotate. D) Refract, Emit, and Absorb. Show Answer Correct Answer: A) Absorb, Reflect, and Transmit. 60. The speed of light, c, equals A) 6.022x10$^{23 }$m/s. B) 2.998x10$^{8}$ m/s. C) 6.626x10$^{-34 }$m/s. D) 1.06x10$^{-19 }$m/s. Show Answer Correct Answer: B) 2.998x10$^{8}$ m/s. ← PreviousNext →Related QuizzesScience QuizzesClass 12 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books