Waves and Electromagnetic Spectrum Questions and Answers with Complete Solutions

Waves and Electromagnetic Spectrum Questions and Answers with Complete Solutions What type of electromagnetic radiation is used to generate images in medical X-ray technology? X-rays. Why are gamma rays used in cancer treatment? They have very high energy that can destroy cancer cells. How does the wavelength of visible light compare to that of radio waves? Visible light has a shorter wavelength than radio waves. What type of electromagnetic radiation is used in night vision technology? Infrared radiation. What happens to light as it passes through a prism? It bends and separates into different colors due to varying wavelengths. 2 How does the frequency of light relate to its color? Higher frequencies correspond to colors like violet, while lower frequencies correspond to colors like red. Why does light bend when passing through different materials, such as water or glass? Because light travels at different speeds in different media, causing it to refract. What happens to the wavelength of light when it enters a denser medium? The wavelength decreases. How is the energy of an electromagnetic wave related to its wavelength? Shorter wavelengths have higher energy. What are the practical uses of infrared radiation? Infrared radiation is used for heat sensing, thermal imaging, and remote controls. Why do some materials glow when exposed to ultraviolet light? They absorb ultraviolet light and re-emit it as visible light, a process called fluorescence. 3 What is the main purpose of a Faraday cage? To block electromagnetic fields. How does the electromagnetic spectrum help in diagnosing medical conditions? Different parts of the spectrum, like X-rays and infrared, help visualize and detect various conditions. Why are gamma rays dangerous to living organisms? Because they have enough energy to damage cells and DNA. What property of electromagnetic waves allows them to travel through a vacuum? Electromagnetic waves consist of oscillating