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Physics Unit 8
| Question | Answer |
|---|---|
| The position in a pendulum's motion in which there is no actual force in effect is called _________. | equilibrium |
| At maximum _________, the potential energy of a pendulum is also at maximum. | amplitude |
| At equilibrium, the pendulum's potential energy is zero and the velocity is ________. | maximum |
| The distance between two similar points in consecutive pulses in a wave is called the _________. | wavelength |
| The distance between the center line and the point farthest from the center line in a wave is called the _________. | amplitude |
| In a spring, the period of oscillation depends on the mass and the ______________. | spring constant |
| Waves that require a medium are called ___________ waves. | mechanical |
| Transverse waves vibrate __________ to the line of travel. | perpendicular |
| A regular, repeating motion caused by the exchange of energy from potential energy to kinetic energy and back again is called _____________. | simple harmonic motion |
| Sound waves are an example of _________ waves. | mechanical |
| Waves travel through a medium with a definite _________. | velocity |
| If wavelength increases, frequency _________. | decreases |
| Two waves traveling along the same line will _______ with each other. | interfere |
| In constructive interference, the effect on amplitude is called _________. | reinforcement |
| Sound waves radiate in _______ waves. | spherical |
| Sound waves below 20 Hz are called ___________. | infrasonic |
| Which of the following is NOT an example of an electromagnetic wave? A. x-rays B. visible light C. sound D. radio | C. sound |
| The magnitude of an electromagnetic wave and the _________ vary in an inverse-square relationship. | distance |
| Electromagnetic waves which excite the water molecules in food and cause it to be cooked are _________. | microwaves |
| Electromagnetic waves which cause the body to produce vitamin D are ___________. | ultraviolet light |
| Electromagnetic waves that can both cause cancer and be used in its treatment are _____________. | gamma rays |
| Sound waves above 20,000 Hz are called __________. | ultrasonic |
| The natural vibration of an object to a range of frequencies of sound is called beats. T/F | F |
| Loudness is measured in decibels. T/F | T |
| The Doppler effect results in a change in perceived frequency. T/F | T |
| A changing magnetic field induces an electric charge is the foundational idea of what law? | Maxwell's |
| A fluctuating electric charge creates a magnetic field is the foundational idea of what law? | Faraday's |
| What is the formula relating frequency, wavelength, and speed of an electromagnetic wave? | C=f^ ; speed=frequency times wavelength |
| The electrical and magnetic waves travel ________ to each other and to the direction of travel. | perpendicular |
| As the frequency of waves increases, the wavelength ___________. | decreases |
| Electromagnetic waves with the lowest frequencies are _____________. | radio waves |
| Light waves are a form of ____________ waves. | electromagnetic |
| All electromagnetic waves can be measured in terms of _____________. | energy |
| Light can also be measured in terms of _____________. | brightness |
| The magnitude of light is subject to the inverse-square law between its power at the source and the ____________. | distance from the source |
| A line that is perpendicular to a surface is called a(n) ___________ line. | normal |
| The angle of __________ is equal to the angle of reflection. | incidence |
| The reflected image in a flat mirror is always _____________. | reversed |
| The reflected image in a flat mirror is called a ______________ image. | virtual |
| The image in a concave mirror that is inverted and smaller than the object is called a ____________ image. | real |
| The distance from the surface of a concave mirror where a focused image is formed is called the ________________. | focal length |
| The index of refraction of a material is found by dividing the speed of light in a vacuum by ____________________. | the speed of light in a medium |
| If a light wave enters a medium having a higher index of refraction than the medium it is leaving, it will bend ___________ the normal line. | toward |
| When we see an object, we see light that is _____________ by it. | reflected |
| Different wavelengths of light are refracted at different __________. | angles |
| Sunlight is ____________ light, made up of many colors. | composite |
| Leaves appear green because the leaves _____________ green light. | reflect |
| The sky appears blue because the atmosphere ___________ blue light wavelengths more than it does other wavelengths. | scatters |
| Sound waves radiate in spherical __________ waves. | longitudinal |
| If a light wave enters a medium having a lower index of refraction than the medium it is leaving, it will bend ____________ the normal line. | away from |
| Loudness is measured in ___________. | decibels |
| The Doppler effect results in a change in perceived ___________ of a wave. | frequency |
| The natural vibration of an object to a range of frequencies is called _______________. | resonance |
| The distance from the surface of a concave mirror where a focused real image is formed is called the ____________. | focal length |
| As the frequency of an electromagnetic wave increases, the _____________ decreases. | wavelength |
| In constructive interference, the effect on amplitude is called ________________. | reinforcement |
Created by:
jhincks
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