IPC Ch 12
Terms
undefined, object
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- The effect in which white light separates into component colors is...
- dispersion
- any sound consisting of waves with frequencies lower than 20 Hz...
- infrasound
- a transparent object that refracts ligh rays causing them to converge or diverge to create an image
- lens
- a model of light represents light traveling through space in an imaginary straight line
- light ray
- a change in the size of an image compared with the size of an object
- magification
- a particle of light
- photon
- the perceived highness or lowness of a sound, depending on the frequency of sound waves
- pitch
- a transparent block with a triangular cross section
- prism
- a system that uses reflected radio waves to determine the distance to and location of objects
- radar
- an image of an object formed by many light rays coming together in a specific location
- real image
- an effect in which the vibration of one object causes the vibration of another object at a natural frequency
- resonance
- a system that uses sound waves to determin the distance to and location of objects
- sonar
- the complete reflection of light at the boundary between two transparent mediums when the angle of incidence exceeds the critical angle
- total internal reflection
- any sound consisting of waves with frequencies higher than 20000Hz
- ultrasound
- an image that forms at a point from which light rays appear to come but do not actually come
- virtual image
- the speed and sound waves depends on what?
- temperature, density and other properties of the medium
- _________ and __________ lie beyond the range of human hearing
- infrasound and ultrasound
- the loudness of sound depends on what?
- intensity
- relative intensity is measured in what?
- decibels
- what do musical instruments use to produce sound?
- standing waves and resonance
- the ear converts vibrations in the air into what?
- nerve impulses in the brain
- what can be used to determine distances or create sonograms
- reflection of sound or ultrasound waves
- what must change when pitch gets higher?
- frequency
- what must change when a sound gets louder?
- intensity
- why does sound travel faster in water than air?
- in liquids or solids the particles are much closer together so vibrations are transferred more rapidly (except rubber)
- the sound produces by a guitar will be loudest when the forced vibrations cause the body of the guitar to vibrate (forced vibration). this is called....
- resonance
- what are two factors that affect the speed of sound
- temperature, density and/or properties of the medium
- what is the energy of a photon proportional to?
- the frequency of the corresponding light wave
- T/F? Light travels more slowly in a medium
- True
- the electromagnetic spectrum consists of light at all possible energies, frequencies, wavelengths T/f?
- True
- what are examples of elements in the electromagnetic spectrum?
- light, x rays, infrared light, microwaves, radio waves
- name the regions of the electromagnetic spectrum from the shortest to longest wavelengths
- gamma rays, xrays, uv, visible light, infrared, microwaves, tv, radio
- which photons have greater energy - those with microwaves or those with visible light?
- microwaves? look it up
- when is light reflected
- when it strikes a boundary between two different mediums
- when does the angle of reflection = the angle of incidence
- when light reflects off a surface
- mirrors form images according to what law?
- the law of reflection
- what impact does wavelength have on the color of an object
- the color depends on the wavelength the object reflects
- describe the law of reflection
- the new direction of light is related to the old direction in a definite way
- list 3 examples of the diffuse reflection of light
- skin, grass, any rough (not smooth surface)
- what is refraction?
- when light bends
- what is magnification
- change in the size of an image compared with the size of the object
- what is a prism
- a transparent block with a triangular cross section
- what is dispersion
- an effect in which white light separates into its component colors