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Name: Inatraatione, Reed at _ _ Grade Section: == Ss\" Scores ___ ions: Read and analyze the questions that follow and choose the letter of the best answer. Encircle the letter of the correct answer. For Items 1-9, please refer to STEM 1. a . STEM 1 COMPARISON OF WAVELENGTHS IN THE EM SPECTRUM The EM spectrum is a range of all types of EM waves, categorized by their wavelengths and frequencies. The wavelength is the distance between two consecutive peaks of a wave, and it varies significantly across the spectrum, The seven types of electromagnetic waves, arranged from longest to shortest wavelength are, radio waves, microwaves, infrared, visible light, ultraviolet rays, X-rays, and gamma rays. 4. Radio waves have the longest wavelength, ranging fram a few meters to thousands of kilometers. These waves are commonly used for tadio and TV broadcasting due to their ability to travel long distances and diffract around obstacles. 2 a waves have shorter wavelength, typically ranging from 4 millimeter to 1 meter, They are used in microwave ovens and radar technology. 9. Infrared waves have wavelengths slightly longer than visible light, ranging from about 700 nanometers (nm) to 1 millimeter. They are often associated with heat and are used in thermal imaging cameras. Seaton. is the only part of the spectrum that can be seen by the human eye, with wavelenaths ranging from about 400 nm (violet) to nm , 5, Ultraviolet (UV) waves have shorter wavelenaths than visible light, from 40 nm to 400 nm, These waves are responsible for sunbums and are used in sterilization processes. 6. X-rays have even shorter wavelengths, typically from 0,01 nm to 10 nm, Due to their high energy, rays are used in medical imaging to view the inside of the human body. 7. Gamma rays have the shortest wavelength, less than 0.01 nm. They are the most energetic waves in the spectrum and are used by nuclear reactions and certain types of radioactive decay. The wavelength and frequency of electromagnetic waves are inversely related: as the wavelength decreases, the frequency increases. This relationship explains why gamma rays have the highest energy, while radio waves have the lowest. 7, Which type of electromagnetic wave has the longest wavelength? A, X- rays B. Visible light C. Radio waves D. Gamma rays 9. Which wave is commonly associated with heat? A, Microwaves B. Infrared waves C. Ultraviolet rays D, Gamma rays 3. What is the typical wavelength range of visible light? A, 700 nm to 1mm B. 0,01 nmto 10 nm C. 400 nm to 700 nm D. i mto 100m 4. Which electromagnetic wave is used in medical imaging? A, Radio waves B. Ultraviolet Waves C. X-rays D. Miccrowaves 5, What type of electromagnetic wave can cause sunburn'? A. \ frared B. Gamma rays C. Ultraviolet D. Radio waves 5. Which of the following correctly lists the electromagnetic waves from shortest to longest wavelength? A, Radio waves, microwaves, infrared, ultraviolet, visible light, X-rays, gamma rays 3. Gamma rays, X-fays, ultraviolet, visible light, infrared, microwaves, radio waves C. Microwaves, infrared, visible light, gamma rays, X-rays, ultraviolet, radio waves D. Ultraviolet, gamma rays, X-rays, visible light, infrared, microwaves, radio waves 7. Which two electromagnetic waves gre commonly used in communication technologies? A. Gamma rays X-fays B, Radio waves microwaves C. Infrared Ultraviolet waves D. X-rays infrared waves 8, Which two electromagnetic waves have wavelengths shorter than visible light? A. Microwaves infrared waves B, Ultraviolet rays X-rays C. Radio waves Microwaves D. Infrared Visible light 9, Which of the following is true about the relationship between wavelength and frequency in the EM spectrum? A, As wavelength increases, frequency also increases C. Wavelenath and frequency are not related B. As wavelength increases, frequency decreases D. As frequency increases, wavelength ramains canstant For Items 10-18, please refer to STEM 2. STEM 2 PRACTICAL APPLICATIONS OF THE EM WAVES Electromagnetic waves (EM) play a crucial role in everyday technology. Each type of EM wave hag a unique properties, allowing it to be used in specific applications. . 4. Radio waves: Radio waves have the longest wavelength and are used for communication, They are essential in broadcasting radio and television signals, as well as in Wi-Fi and mobile phone communications. 9. Microwaves: Microwaves have shorter wavelengths than radio waves. They are widely used in cooking (microwave ovens) and in radar systems for weather forecasting and alr traffic control. | 3, Infrared waves: Infrared radiation ig emitted by objects as heat. It is used in remote controls, thermal imaging cameras, and in medical e infrared lamps for muscle therapy, . ; an light: Visible light in the only part of the EM spectrum that can be seen by the human eye. {tis crucial for vision and is used in lications such as lighting, photography, and fiber- optic communication. apiriaanconrly rays: WW rays have shorter wavelengths than visible light and can kill bacteria, They are used in sterilization and infection, However, excessive exposure can be harmful, causing skin damage. \"s X-rays: X-rays have even shorter wavelengths and are highly penetrative. They are used in medical imaging to view bones and in ners. , on rays: Gamma rays have the shortest wavelength and the highest energy. They are used in cancer treatment (radiotherapy) and at in sterilizing medica uipment), Be