Vocabulary for light and sound unit
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| The term describing sounds with frequencies higher than 20,000 Hz | Ultrasonic
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| A disturbance that transmits energy through matter or space | Wave
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| A mirror that curves out toward you, like the back of a spoon | Convex mirror
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| The transfer of energy carried by light waves to particles of matter | Absorption
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| The entire range of electromagnetic waves | Electromagnetic spectrum
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| A substance through which a wave can travel | Medium
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| A wave that can travel through space or matter and consists of changing electric and magnetic fields | Electromagnetic wave
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| A wave in which the particles of the medium vibrate back and forth along the path that the wave travels | Longitudinal wave
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| Matter that can transmit light, but also scatters the light as it passes through the matter | Translucent
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| The process of using reflected sound waves to find objects | Echolocation
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| A curved, transparent object that forms an image by refracting light | Lens
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| The number of waves produced in a given amount of time | Frequency
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| Occurs when an object vibrating at or near a resonant frequency of a second object causes the second object to vibrate | Resonance
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| The term describing sounds with frequencies lower than 20 Hz | Infrasonic
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| A wave that forms a pattern in which potions of the wave do not move and other potions move with a large amplitude | Standing wave
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| a wave interaction that occurs when two or more wave overlap and combine | Interference
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| The law that states tat the angle of incidence is equal to the angle of reflection | Law of reflection
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| A lens that is thinner in the middle than at the edges | Concave lens
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| The speed at which a wave travels | Wave speed
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| A wave in which the particles of the wave’s medium vibrate perpendicularly to the direction the wave is traveling | Transverse wave
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| Matter that does not transmit any light | Opaque
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| The emission of energy in the form of electromagnetic waves | Radiation
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| The distance between one point on a wave and the corresponding point on an adjacent wave in a series of waves; for e3xample, the distance between two adjacent crests or compressions | Wavelength
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| Matter that light can be easily transmitted | Transparent
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| The maximum distance a wave vibrates from its rest potion | Amplitude
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| A reflected sound wave | Echo
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| The most common unit used to express loudness | Decibel
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| A material that gives a substance its color by absorbing some colors of light and reflecting others | Pigment
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| The release of light energy by particles of matter that have absorbed energy | Scattering
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| The bending of waves around barriers or through openings | Diffraction
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| How high or low a sound is perceived to be | Pitch
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| The passing of light through matter | Transmission
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| A mirror with a flat surface | Plane mirror
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| A mirror that is curved inward like the inside of a spoon | Concave mirror
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| The bending of a wave as it passes at an angle from one medium to another | Refraction
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| The bouncing back of a wave after it strikes a barrier or an object | Reflection
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| A lens that is thicker in the middle than at the edges | Convex lens
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| The apparent change in the frequency of a sound caused by the motion of either the listener or the source of the sound | Doppler effect
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| How loud or soft a sound is perceived to be | Loudness
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