Electromagnetic Radiation

Master Electromagnetic Radiation! Explore the EM spectrum, wave properties, and sources.

crest trough amplitude wavelength origin Electromagnetic Spectrum Matching Click and drag to the best description. high frequency short wavelength speed of light 3 x 10^8 m color with longest wavelength Red Color with highest frequency Violet Wave used to cook food. Microwave crest top of wave trough bottom of wave A. What are electromagnetic waves?1. A(n) electromagnetic wave is a wave that can travel through empty space or through matter.a. Electromagnetic waves radiate, or spread out, in all directions from a(n) source.b. Radiant energy is the energy carried by an electromagnetic wave.2. Electromagnetic waves form when a(n) electric charge speeds up, slows down, or changes direction.a. A(n) electric field surrounds a charged particle.b. A changing magnetic field produces an electric field, and a changing electric field produces a magnetic field.c. When a charged particle vibrates, the electric field around it vibrates, producing a changing magnetic field, which then produces a changing electric field.d. These changing fields spread out in all directions as electromagnetic waves. 3. Electromagnetic waves are transversewaves with certain properties.a. The wavelengthis the distance from one point on a wave to the corresponding point on the next wave.b. Frequencyis the number of waves that pass a specific point in a certain period of time.c. As the frequency of a wave decreases, wavelength increases.d. All electromagnetic waves travel through space at a speed of 300,000, 000 km which is the speed of light.e. The speed of a wave is its frequency multipliedby its wavelength.f. When electromagnetic waves move through matter, their speed decreases. B. Sources of Electromagnetic Waves1. All types of matter produce electromagnetic waves.2. As the temperature of an object increases, its particles vibrate faster and it produces more electromagnetic waves with shorter wavelengths.3. Earth’s most important source of energy is the Sun, which gives off energy in the form of electromagnetic waves.a. The only electromagnetic waves humans can see are light waves.b. Infrared waves have wavelengths that are longer than those of light.c. Ultraviolet waves have wavelengths that are shorter than those of light. 4. The Moon, stars, and planets also emit radiation, most of which is not visible, but can be detected by telescopes.5. On Earth, campfires, lightbulbs, and stove burners are hot enough to produce electromagnetic waves that carry energy you can feel.a. Everything you see produces electromagnetic waves.b. Special cameras produce visible images of invisible waves on Earth. C. The Energy of Electromagnetic Waves1. The energy of electromagnetic waves is related to their frequency.2. Waves that have lower frequency, such as light waves, have lower energy.3. The energy of mechanical waves is related to their amplitude.4. The energy of electromagnetic waves is related to frequency, not amplitude. Electromagnetic Wave can radiate, or spread out, in all directions from a source produced by the vibrating motion of an electric charge a wave that can travel through empty space and through matter Radiant Energy carried by an electromagnetic wave is also known as electromagnetic radiation Temperature a measure of the average kinetic energy of the particles that make up an object increases as an object’s particles vibrate faster How do electromagnetic waves form? Label this diagram by writing the correct term or phrase from the word bank on each line. (Hint: The diagram shows the vibrating motion of an electric charge producing an electromagnetic wave.)direction the waves travelelectric chargeelectric fieldmagnetic field electric field electric charge magnetic field direction the waves travel The only type of electromagnetic waves you can see are infrared waves. ultraviolet waves. visible light waves. When electromagnetic waves encounter matter, they speed up. slow down. do not change speed. What produces electromagnetic waves? moving electric field the vibration of charged particles the force created when two magnets are in contact Which statement is true of all electromagnetic waves? They are visible. They require a medium. They travel at the same speed. They carry the same amount of energy. Which objects emit electromagnetic waves? A. all objects B. all hot objects C. all moving objects D. all shining objects all objects all hot objects all moving objects all shining objects