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42 Cards in this Set
- Front
- Back
List the electromagnetic rays in order from lowest energy to highest energy:
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Radio waves, mocrowaves, infared light, redlight, green light, ultra violet ,
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Order the colors of the rainbow in order of shortest to longest wavelenght:
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Red, orange, yellow, green, blue, violet
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True or false: in order to see an object, light must reflect from the object into your eyes?
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True
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List the 7 colors that newton identified in the visible spectrum of white light .
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red, orange, yellow, green, blue, indigo, violet
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what is the relationship between frequency and wavelength of a wave?
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As the frequency increases the wavelenght decresases
As the frequency decreases the wavelenght increases |
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What colors are absorbed in a green object? And what are reflected?
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White light is absorbed
Green light is reflected |
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What colors are absorbed in a black object? What are reflected?
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White light is absorbed .
None are reflected |
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What colors are absorbed in a white object? What are reflected?
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white light is absorbed
all colors reflected |
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Wave:
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A disturbance that transfers energy from one point to another without transfering matter
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Crest
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The highest point in a wave
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Trough
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The lowest point in a wave
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Frequency
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The rate of the repition of waves
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Wave length
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the distance from crest to crest measured in meters
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Amplitude
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Wace height from the rest position of the wave to the crest or from the rest position to the trough
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Electromagnetic spectrum
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The entire range of electromagnetic radiation
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medium
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something that light travels through
eg, air or glass |
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visible light
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electro magnetic waves that the human eye can see
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Why does light bend ?
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when light bends its called refraction. It only bends when it travels from one medium to another
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What would the angle of incidence be for an angle of reflection of 47?
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the angle of incidence = the angle of reflection so it would also be 47
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Some restaurants cover an entire wall with a large, plane mirror. What effect does this have on the appearance of the restaurant? Why does this happen?
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They use it because it creates the illusion of depth. A larger mirror with more angles of incidence creates more angles of reflection and the eye perceves more reflections as increased volume
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Two rules of reflection for a plain mirror
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1) angle of incidence = angle of reflection
2) distance of the object infront of the mirror = distance of the object behind the mirror |
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Angle of incidence
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The angle between the incidence ray and the normal
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Angle of reflection
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the angle between the reflected ray and the normal
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Reflected ray
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the outgoing ray
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Incident ray
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the incomming ray
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Normal
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dashed ray that is perpendicular to the mirror
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Plane mirror
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any mirror that has a flat reflective surface
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Convex miror
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when the buldged out part of a sphere is facing you
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Cancave miror
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when the hollowed out part of a sphere is facing you
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Virtual Image
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when the rays cross behind the miror
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Real Image
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when the rays cross infront of the mirror
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Focal length
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The distance from the vertex to the focal point
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Center of curvature
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where the center of the hollow sphere
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magnification
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how much the image is enlarged
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Vertex
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where the principal axis touches the canter of the miror
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diverging rays
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rays that spread apart from behind the miror
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converging rays
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rays that meet infront of the mirrow
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what kind of rays appear in convex mirors
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rays that diverge
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what kind of rays appear in concave mirors
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rays that converge
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Myopia
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Nearsighted
people who can see nearby objects but not far way |
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hyperopia
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Farsighted
people who can see far way objects but not close up ones |
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astigmatisim
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A commun condition in which the eye cannot see a clear image
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