Test Waves and Electromagnetic Radiation Questions and Answers Already Passed

Test Waves and Electromagnetic Radiation Questions and Answers Already Passed What is the primary characteristic that defines a wave? It transfers energy without moving matter. How do electromagnetic waves differ from mechanical waves? Electromagnetic waves do not require a medium to travel. What is the main characteristic of radio waves? They have long wavelengths and are used for communication. What is the frequency range of visible light? Between approximately 430 THz and 770 THz. Why do electromagnetic waves travel faster in a vacuum than in any medium? Because there is no matter to slow them down. 2 What is the primary function of radio waves? They are used for broadcasting signals like radio and television. Why does blue light have a shorter wavelength than red light? Because higher energy light waves have shorter wavelengths. What is the main feature of infrared radiation? It is associated with heat and can be detected by thermal sensors. Why are gamma rays more dangerous than visible light? They have much higher energy and can penetrate deeply into the body. What causes the different colors of visible light? The different wavelengths of the light waves. How does the frequency of a wave affect its energy? Higher frequencies result in higher energy. 3 What determines the energy of a wave? The frequency of the wave. How does the wavelength of light change as the frequency increases? The wavelength decreases. What type of electromagnetic radiation has the longest wavelength? Radio waves. How do X-rays interact with matter? They can pass through soft tissues but are absorbed by denser materials like bones. What is the primary use of ultraviolet radiation? It is used for sterilization and tanning. What is the significance of the wave-particle duality of light? It means light behaves both as a wave