Wave Powerpoint
Transcript: \ Destructive Interference Doppler Effect Reflection is when incoming light hits an object and bounces off. Very smooth surfaces such as mirrors reflect almost all incoming light. A surface wave is a wave in which particles of the medium undergo a circular motion Electromagnetic Spectrum Mechanical Waves 1. transverse and longitudinal 2. transverse 3. longitudinal 4. diffraction 5. refraction 6. the combination of two or more waves that results in a single wave 7. destructive interference 8. visible light 9. radio waves 10. mechanical wave The reflection of sound follows the law "angle of incidence equals angle of reflection", sometimes called the law of reflection 1. Name two types of mechanical waves 2. Which type of wave moves in an up and down motion? 3. What type of wave moves parallel to the wave energy? 4. a change in the direction of a wave when the wave finds an obstacle or an edge, such as an opening is known as: 5. the bending of a wavefront as the wavefront passes between two substances in which the speed of the wave differs is called: 6. What is Constructive Interference? 7. the combination of two or more waves that reduces or cancels the amplitude is known as: 8. the only part of the electromagnetic spectrum seen by the human eye is: 9. What are the waves used for broadcasting radio signals called? 10. a disturbance in matter that carries energy from one place to another is: the interference of two or more waves of equal frequency and phase, resulting in their mutual reinforcement and producing a single amplitude equal to the sum of the amplitudes of the individual waves. ANSWER KEY Wave Powerpoint Vassiah White & Richard Rockett Ms.Pugh 7th period the interference of two waves of equal frequency and opposite phase, resulting in their cancellation where the negative displacement of one always coincides with the positive displacement of the other. Frequency- the rate at which something occurs or is repeated over a particular period of time or in a given sample Diffraction of Waves Reflection & The Law DEFINE: diffraction involves a change in direction of waves as they pass through an opening or around a barrier in their path Electromagnetic Waves A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves QUIZ the visible spectrum makes up only a small fraction of the different types of radiation that exist. To the right of the visible spectrum, we find the types of energy that are lower in frequency than visible light. These types of energy include infrared rays, microwaves, and radio waves. These types of radiation surround us constantly, and are not harmful, because their frequencies are so low. Constructive Interference Mechanical waves are caused by a disturbance or vibration in matter, whether solid, gas, liquid, or plasma. Matter that waves are traveling through is called a medium. Refraction of Waves Electromagnetic Spectrum A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves. Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space. Transverse, Longitudinal, Surface Waves Ultrasound Electromagnetic waves can be classified and arranged according to their various wavelengths/frequencies; this classification is known as the electromagnetic spectrum. An ultrasound scan is a medical test that uses high-frequency sound waves to capture live images from the inside of your body. Ultra-sound waves can be bounced off tissues by using special devices. The echoes are then converted into a picture called a sonogram. The Doppler effect describes the shift in the frequency of a wave sound when the wave source and/or the receiver is moving. The Doppler effect is something you're familiar with. If you hear an emergency vehicle with its siren on, you notice an abrupt change in the frequency of the siren when it goes past you. Refraction of waves involves a change in the direction of waves as they pass from one medium to another. Refraction, or the bending of the path of the waves, is accompanied by a change in speed and wavelength of the waves Pitch- the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone
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