Physics Exam > Physics Videos > Basic Physics for IIT JAM > Electromagnetic waves (Part- 1)
Electromagnetic waves (Part- 1) Video Lecture | Basic Physics for IIT JAM
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FAQs on Electromagnetic waves (Part- 1) Video Lecture - Basic Physics for IIT JAM
| 1. What are electromagnetic waves? |  |
Ans. Electromagnetic waves are a form of energy that consists of both electric and magnetic fields oscillating perpendicular to each other. These waves propagate through space and do not require a medium to travel. They include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
| 2. How are electromagnetic waves produced? | |
Ans. Electromagnetic waves are produced when an electric charge is accelerated or decelerated. This can occur through various processes such as the oscillation of charged particles, the movement of electrons in an antenna, or the transition of electrons between energy levels in an atom.
| 3. What is the speed of electromagnetic waves? | |
Ans. Electromagnetic waves travel at the speed of light in a vacuum, which is approximately 299,792,458 meters per second (or about 186,282 miles per second). This speed is denoted by the symbol "c" and is a fundamental constant in physics.
| 4. How do electromagnetic waves interact with matter? | |
Ans. The interaction of electromagnetic waves with matter depends on the frequency and energy of the waves. Low-frequency waves, such as radio waves, can pass through most materials with little absorption or scattering. However, higher frequency waves, such as X-rays and gamma rays, can be absorbed or scattered by matter, leading to various effects such as heating, ionization, or medical imaging.
| 5. What are the applications of electromagnetic waves? | |
Ans. Electromagnetic waves have a wide range of applications in various fields. Radio waves are used for communication, television broadcasting, and radar systems. Microwaves are used for cooking, satellite communication, and wireless networks. Infrared waves are used for night vision, remote controls, and thermal imaging. Visible light is essential for human vision and optical communication. X-rays are used in medical imaging and security screening, while gamma rays are used in cancer treatment and nuclear industry.
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Dec 18, 2024 Last updated |
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