- Electromagnetic waves are waves that consist of oscillating electric and magnetic fields, propagating through space at the speed of light. - The electromagnetic spectrum includes (in order of increasing frequency/energy): radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. - a. Television waves are typically radio waves or microwaves, used for broadcasting television signals. They are part of the EM spectrum. - b. Ultraviolet rays (UV) are part of the EM spectrum, with wavelengths shorter than visible light but longer than X-rays. - c. X-rays are high-energy EM waves with wavelengths shorter than UV rays. - d. Sunlight rays are composed of electromagnetic radiation from the Sun, including visible light, infrared, and ultraviolet radiation.
Which of the following are examples of electromagnetic waves? a. Television waves b. Ultraviolet rays c. X-rays d. Sunlight rays
Asked in MPSC CS Prelims 2016 · Topic: Optics (Wave Nature of Light: Huygens' Principle)
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