Waves….. What is a Wave? A Wave is a disturbance that carries energy through a medium or empty space. A Medium is a substance such as a solid, liquid,

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Electromagnetic Waves

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Presentation transcript:

Waves….

What is a Wave? A Wave is a disturbance that carries energy through a medium or empty space. A Medium is a substance such as a solid, liquid, or gas through which a wave can travel. The two main types of waves are Electromagnetic and Mechanical. Add 1 picture of a wave

Wave Characteristics – Wave Motion In Longitudinal waves, the particles of the medium vibrate (move) parallel (side to side) to the direction of the wave An example is a sound wave. In Transverse waves, the particles of the medium vibrate (move) perpendicular (up and down) to the direction of the wave Two examples are light and x rays.

Wave Characteristics – Parts of a Wave - 4 Amplitude is the maximum distance that the particles of a wave’s medium vibrate from their rest position (height). Wave speed is the speed at which a wave travels through a medium Wave speed = frequency x wavelength

Wave Characteristics – Parts of a Wave - 5 Wavelength is the distance from any point on a wave to an identical point on the next wave. (crest to crest and/or trough to trough) Frequency is the number of waves produced in a given amount of time.

Mechanical Waves… 6 Examples of Mechanical waves include: –Sound –Earthquake –Ocean waves Mechanical waves are waves that require a medium to transport energy

Electromagnetic Waves… 7 Electromagnetic waves are waves that do not require a medium to transport energy. They can travel through empty space (a vacuum) from the sun to the earth. Examples of Electromagnetic waves include: –Light –X ray –TV

The Electromagnetic Spectrum 8 The Electromagnetic Spectrum covers the entire spectrum of electromagnetic waves. All waves in the electromagnetic spectrum travel at the same speed but have different wavelength & frequency. Add 1 picture of the electromagnetic spectrum. The Electromagnetic Spectrum includes: –Radio Waves –Microwaves –Infrared –Visible Light –Ultraviolet –X rays –Gamma Rays

Radio Waves - 9 They are located at the beginning of the electromagnetic spectrum They have the longest wavelengths of all electromagnetic waves They have the least frequency of all electromagnetic waves. They have the lowest energy level of all electromagnetic waves Real life uses include radio & television.

Microwaves - 10 They are located between radio & infrared waves Their wavelengths are shorter than radio waves but longer than infrared waves Their frequency is lower than infrared but higher than radio waves Their energy level is lower than infrared but higher than radio waves Real life uses include microwaves & cellular phones.

Infrared Light - 11 They are located between microwaves & visible light. Their wavelengths are shorter than microwaves but longer than visible light. Their frequency is lower than visible light but higher than microwaves. Their energy level is lower than visible light but higher than infrared. Real life uses include infrared binoculars & heat seeking devices.

Visible Light - 12 They are located between infrared & ultraviolet waves. Their wavelengths are shorter than infrared but longer than ultraviolet. Their frequency is lower than ultraviolet but higher than infrared. Their energy level is lower than ultraviolet but higher than infrared. Real life uses include rainbows and everyday

Ultraviolet Light - 13 They are located between xrays & visible lights. Their wavelengths are shorter than visible light but longer than x rays. Their frequency is lower than x rays but higher than visible light. Their energy level is lower than x rays but higher than visible light. Real life uses include sunburn & kill bacteria.

X-Rays - 14 They are located between ultraviolet & gamma rays. Their wavelengths are shorter than ultraviolet but longer than gamma rays. Their frequency is lower than gamma rays but higher than ultraviolet. Their energy level is lower than gamma rays but higher than ultraviolet Real life uses include look at bones & security devices.

Gamma Rays They are located at end of the electromagnetic spectrum They have the shortest wavelengths of all electromagnetic waves They have the highest frequency of all electromagnetic waves. They have the highest energy level of all electromagnetic waves Real life uses include treat cancer & kill bacteria in food.