Electromagnetic Wave

The electromagnetic spectrum 16. These rays have the shortest wavelength of all. They are emitted by some radioactive substances. They are often used in radiotherapy to kill cancer cells. gamma rays ultraviolet infrared microwaves 17. Waves with a high frequency have a _________ wavelength long short 18. The longer the wavelength the _______ the frequency lower higher 19. Electromagnetic waves are ________ waves. happy noisy transverse longitudinal 20. In __________ waves the vibrations are at right angles to the direction of the wave. longitudinal transverse 21. In __________ waves the vibrations are in the same direction as the direction of the wave. longitudinal transverse 22. Electromagnetic waves can travel through a vacuum. true false 23. Sound waves are part of the electromagnetic spectrum. true false 24. Light waves, water waves, microwaves and the ‘Mexican wave’ are all examples of ____________ waves. electromagnetic transverse longitudinal Use the “The electromagnetic spectrum: bounce quiz” at the eChalk website to help you answer these questions. Worksheet to complement eChalk resource: “The electromagnetic spectrum: Bounce quiz” http://www.eChalk.co.uk

(Answers) The electromagnetic spectrum Select the correct answer from the text below each question: 1. Gamma rays travel faster than visible light. true false 2. All electromagnetic waves travel at the same speed in a vacuum. true false 3. The speed of light in a vacuum is… infinite 4. White light is a mixture of colours that can be split into the visible spectrum by a … rainbow prison migraine prism 5. Which of the following has the highest frequency? ultraviolet microwaves x-rays radiowaves 6. Which of the following has the highest frequency? visible light microwaves infrared radiowaves 7. Which of the following has the longest wavelength? gamma rays visible light ultraviolet radiowaves 8. Which of the following has the shortest wavelength? gamma rays visible light ultraviolet radiowaves 9. Which of the following has the lowest frequency? ultraviolet microwaves radiowaves x-rays 10. These waves have the longest wavelength and are used to carry signals for radar, TV and radio radiowaves ultraviolet microwaves infrared 11. These rays are absorbed by bones and teeth but pass through flesh radiowaves x-rays visible light infrared 12. These waves are used to cook food (they are absorbed by water molecules in the food) gamma rays x-rays micro-waves ultraviolet 13. Our eyes are able to see waves in this part of the electromagnetic spectrum ultraviolet radio visible infrared 14. Any warm object emits this wave. Night vision cameras are able to detect this type of wave. gamma rays visible light microwaves infrared 15. These rays are emitted by the sun (and other white hot objects). Over-exposure to these rays can burn the skin and cause skin cancer. gamma rays ultraviolet microwaves infrared 16. These rays have the shortest wavelength of all. They are emitted by some radioactive substances. They are often used in radiotherapy to kill cancer cells. gamma rays ultraviolet infrared microwaves 17. Waves with a high frequency have a _________ wavelength long short 18. The longer the wavelength the _______ the frequency lower higher 19. Electromagnetic waves are ________ waves. happy noisy transverse longitudinal 20. In __________ waves the vibrations are at right angles to the direction of the wave. longitudinal transverse 21. In __________ waves the vibrations are in the same direction as the direction of the wave. longitudinal transverse 22. Electromagnetic waves can travel through a vacuum. true false 23. Sound waves are part of the electromagnetic spectrum. true false 24. Light waves, water waves, microwaves and the ‘Mexican wave’ are all examples of ____________ waves. electromagnetic transverse longitudinal Use the “The electromagnetic spectrum: bounce quiz” at the eChalk website to help you answer these questions. Worksheet to complement eChalk resource: “The electromagnetic spectrum: Bounce quiz” http://www.eChalk.co.uk