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Physics Waves Exam
Mrs. White
| Question | Answer |
|---|---|
| A disturbance in a medium creates as | Waves |
| the material that the wave passes through is called hte | Medium |
| Do all waves require a medium | No |
| Which types of waves requires a medium | Mechanical |
| Which type of mechanical wave moves the particles in the medium at right angles to the wave direction? | Transverse |
| Which type of mechanical wave moves the particles in the medium in the same direction as the wave? | Longitudinal |
| Sound is an example of which type of wave: transverse or longitudinal | Longitudinal |
| Light is an example of which type of wave: transverse or longitudinal | Transverse |
| What is the speed of light in a vacuum? | 3.0 x 10 ^8 m/s |
| What is the speed of sound in air at a temperature of 20 C | 343 m/s |
| What happens to the speed of sound as the air temperature increases by 1 C | It increases by 0.6 m/s |
| The distance a wave travels in a given amount of time is called wa | Wave Speed |
| Is anything faster than the speed of light | No |
| Does the speed of light change when it enters a different medium | Yes (it changes it direction) |
| The distance from one point on a wave to the same point on the next wave is called the | Wavelength |
| The number of waves that pass a point in a second is called the | Frequency |
| The unit is frequency is | Hz |
| What is the formula for the speed of a wave | V = Fy (upside down) |
| Are wavelength and frequency : directly proportional and inversely proportional? | Inversely |
| The time that is takes for a wave to complete a cycle (pass a given point) is called the | Period |
| When a wave hits a boundary between two media, the incoming wave is called the ________ wave | Incident |
| A line drawn perpendicular to the boundary is called the | Normal |
| The angle between the incident wave and the normal is called the | Angle of Incidents |
| At a boundary between two media, the wave can be reflected, transmitted, or both | Reflected |
| If reflected, the wave that bounces back is called the _____ or ray | Reflective Wave |
| The angle between the normal and the reflected wave is called the | Angle of Reflection |
| According to the Law of Reflection, the angle of reflection is ____ the angle of incidence | Equal |
| For the part of the wave that is transmitted, if the wave changes speed, the wave is bent or | Refracted |
| The bending of light around a barrier is called | Difraction |
| The Superposition Principle states that the reflected wave and the incoming waves are ______ together | Added |
| The result of the superposition of two waves is called | Interference |
| If the superposition occurs with waves of equal but opposite displacement (one a crest and one a trough), the interference is | Destructive |
| If the superposition occurs with waves of equal displacements in the same direction (two crests or two troughs), the interference | Constructive |
| The point of zero displacement due to destructive interfernce is called a | Node |
| The point of maximum displacement due to constructive interference | Anti Node |
| When interference occurs so that the waves appear to stand still, what type of wave is produced? | Standing Wave |
| Point A on the standing wave diagram represents which type of interference ? | Constructive |
| Point A is called the | Anti Node |
| Point B on the standing wave diagram represents which type of interference? | Destructive |
| Point B is called the | Node |
| If the solid line represents the incident wave, what does the dotted line represent? | Reflected wave |
| The change in frequency of a wave due to the movement of either the source or the observer is known as the | Doppler Effect |
| If the change in frequency causes the wavelength to decrease, the shift is known as a | Blue Shift |
| If the change in frequency causes the wavelength to increase, the shift is known as a | Red Shift |
| Human perceive amplitude as | Loudness |
| What is the unit for loudness | dB |
| What is the range of sounds level that humans can hear | 0 - 140 dB |
| Can loud noises damage the human ear leading to hearing loss? | Yes |
| Semicircular Canals | Helps you keep balance |
| Eustachian | Keeps air pressure and fluids from building up in the ear |
Created by:
zdmcginnins