Virtual Lab- Electromagnetic Spectrum- Speed of electromagnetic waves-light Interactive Figure...

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    Lab5 Speed of electromagnetic waves




Virtual Lab- Electromagnetic Spectrum- Speed of electromagnetic waves-light Interactive Figure 26.03 (https://media.pearsoncmg.com/aw/aw_0media_physics/interactive-figures/#electromagnetic_spectrum) Theory: Light is an example of an electromagnetic wave. Electromagnetic waves can travel through the vacuum of interstellar space. They do not depend on an external medium—unlike a mechanical wave such as a sound wave which must travel through air, water, or some solid medium. Electromagnetic waves cover a huge range of frequencies, from high-frequency gamma rays and x-rays, to ultraviolet light, visible light, and infrared light, and on into microwaves and radio waves. As the frequency decreases, so does the energy. The wavelength of an electromagnetic wave is inversely proportional to its frequency. So, waves with high frequency have short wavelengths, and waves with low frequency have long wavelengths. The speed or velocity of light is approximately 186,000 miles per second or 300,000 kilometers per second (3 x 105 km/s = 3 x108 m/s) in vacuum. All electromagnetic waves, including visible light, travel at that speed. The speed of the electromagnetic waves slows down when they pass through matter. According to the Theory of Relativity, the speed of light is the fastest at which anything can travel. Electromagnetic waves interact with materials in different ways, depending on the nature of the material and the frequency of the electromagnetic wave. Light is the range of electromagnetic waves that are visible (Figure 1). For humans, the range of visible wavelengths is from 400 to 700 nm (1 nm = 1 ×10−9 m). This range of wavelengths is called the visible spectrum of light. When you see a rainbow in the sky, or white light that has been refracted through a prism, or diffracted by the regular surface of a CD, you are seeing a spectrum of colors. The different colors are related to the different wavelengths of light. Violet light is at the short-wavelength end of the visible spectrum (400 nm), and red light is at the long-wavelength end of the visible spectrum (700 nm), with the rainbow of colors in between. We perceive different colors because our visual system has evolved to make use of the spectral information in reflected light. When light interacts with an object, the light can be absorbed by the object, reflected by the object, or transmitted by the object. Lab Procedure: The goal of this Lab is to investigate whether different frequencies of electromagnetic waves have different velocities. 1- Open interactive Figure 26.03 . Adjust the slider on a mark which is at the middle between wavelength 10-16 and 10-12 m for the range of Gamma rays, that number should be 9.33 x 10-15 m. Record this wavelength and the frequency and the speed of Gamma rays in the experimental value for speed in the table. 2- Calculate the theoretical value for the speed of light. C= f λ, C is the symbol for velocity of all types of electromagnetic waves. 3- Repeat steps 1 and 2 for all the wavelength in the table. Adjust the slider until you locate a number close to the numbers given in the table. (you may replace a new number for the wavelength if you can not find the exact location for this wavelength.) Electromagnetic wave range Wavelength In Meters Frequency In Hetrz Experimental velocity in m/s Theoretical Velocity in m/s Gamma rays 9.33 x 10-15 3.21 x 1022 3 X 10 8 C = f λ = (3.21 x 1022 x 9.33 x 10-15) =2.99 X 108 = 3.00 X 108 m/s X rays 8.91 x 10-11 Ultraviolet 9.77 x 10- 8 Visible light 5.37 x 10-7 Infrared 9.12 x 10-6 Short radio waves 1.00 x 10 -2 Long radio waves 8.51 x 10 1 Questions: Answer in complete sentences and in a color different than black. 1- What is the speed of X-rays? 2- What is the speed of light? 3- What is the speed of radio waves? 4- Do radio waves travel at the speed of sound, or at the speed of light, or somewhere in between? 5- Which have the longest wavelength –light waves, X-rays, or radio waves? 6- What is your conclusion about speed of all electromagnetic waves? 7- What is the relation between wavelength and frequency? Write down the formula. 8- The wavelength of visible light is in about 5.37 x 10-7 m- convert this number to nano meters. 1 m =109 nano- meter or 1 nanometer =10-9 m 9- Calculate the frequency of the above wavelength (5.37 x 10-7 m). 10- Did type your name?
Answered Same DayAug 15, 2021

Answer To: Virtual Lab- Electromagnetic Spectrum- Speed of electromagnetic waves-light Interactive Figure...

Shomik answered on Aug 16 2021
139 Votes
Virtual Lab- Electromagnetic Spectrum- Speed of electromagnetic waves-light
Interactive Figure 26.03 (https://media.pearsoncmg.com/aw/aw_0media_physics/interactive-figures/#
electromagnetic_spectrum)
Theory: Light is an example of an electromagnetic wave. Electromagnetic waves can travel through the vacuum of interstellar space. They do not depend on an external medium—unlike a mechanical wave such as a sound wave which must travel through air, water, or some solid medium. Electromagnetic waves cover a huge range of frequencies, from high-frequency gamma rays and x-rays, to ultraviolet light, visible light, and infrared light, and on into microwaves and radio waves. As the frequency decreases, so does the energy. The wavelength of an electromagnetic wave is inversely proportional to its frequency. So, waves with high frequency have short wavelengths, and waves with low frequency have long wavelengths.
The speed or velocity of light is approximately 186,000 miles per second or 300,000 kilometers per second (3 x 105 km/s = 3 x108 m/s) in vacuum. All electromagnetic waves, including visible light, travel at that speed. The speed of the electromagnetic waves slows down when they pass through matter. According to the Theory of Relativity, the speed of light is the fastest at which anything can travel.
Electromagnetic waves interact with materials in different ways, depending on the nature of the material and the frequency of the electromagnetic wave. Light is the range of electromagnetic waves that are visible (Figure 1). For humans, the range of visible wavelengths is from 400 to 700 nm (1 nm = 1 ×10−9 m).
    
    
This range of wavelengths is called the visible spectrum of light. When you see a rainbow in the...
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