Test 3 Light 1 An indication that light is a wave is a b c d that it has dark bands in the different pattern that it passes through glass that it reflects off surfaces its high speed 2 The colors of an oil slick indicate that a Light is a wave b Light bends when entering material c Light changes its wavelength when passing through oil d Oil is made of many different chemicals with different colors 3 The index of refraction measures a The frequency of light b The speed of light c The period of light d Density of the glass 4 Lights waves are 5 The resolution of a human eye is about a Longitudinal b Transverse c Circular a 4 mm b 2 cm c 1 micron d 1 60 degree a Water b Glass c Air d Crystal a Decreases b Increases c Stays the same 7 As the wavelength of light decreases the frequency 6 Which of the following has the lowest index of refraction 8 In one millionth of a second light will travel caution possibly a trick question a About 1 foot b About 1000 feet c From one side of a computer chip to the other d From the Earth to the Moon 9 A piece of glass is shaped like a pyramid the side of the pyramid is tilted at 45 degrees with respect to the horizontal A beam of light is inside the glass moving horizontally When it emerges from the tilted surface of the glass it will be moving a Perfectly horizontally b c In a direction that is tilted upward so it will eventually go into space In a direction that is tilted downward so it will eventually hit the ground 10 A stop sign is bright when you shine the headlamps of your car on it It most likely is covered with a Fluorescent paint b Phosphorescent paint c Tritium d Small glass spheres 11 Diamonds sparkle in many colors because a Light travels very slowly b Light travels very fast c There is color dependent absorption d Light velocity depends on color 12 Which of the following are retroreflectors Choose all that apply 13 Two soap bubbles from the same soap appear to be different colors They probably have a Bicycle reflectors b Human eyes c Stop signs d Animal eyes a Different sizes b Different absorption c Different temperature d Different thickness a 1 5 c b c d 0 999 c 2 3 c c 14 If c is the speed of light in vacuum then the speed of light in glass is approximately 15 Stealth bombers are undetected by radar in part because a Of their low heat emission b Of their high speed c They are made of translucent materials d Of the absence of corner reflectors 16 Rainbows show different colors because In water different frequencies have different velocities a Droplets of water have different sizes b c The direction of light spreads because the wavelength is short d Droplets of water change the color of air molecules 17 Which of the following is polarized a Blue sky light b Direct sunlight yellow c Light from a candle d Light from a TV screen 18 A fiber can send much more information per second than a wire because a Light has a very high frequency b Electricity travels better in glass than in a wire c Sound travels very rapidly in glass d Light travels faster than electricity 19 Which color of light would give the highest number of bits per second in fiber optics a Red b white c Blue d infrared 20 Shannon is famous for having invented or discovered 21 The human eye has cones that detect a GPS b Global Hawk c The sound channel d The bit a Red yellow blue b Cyan magenta yellow c Yellow green red d Green blue red 22 People squint to see better because squinting a Reduces the light b Bends the lens to make it stronger c Reduces the blur size d They don t see better They only think they do 23 Old people need reading glasses because their a Pupils can t contract as well b Eyes become less sensitive to visible light c d They forget how to read Lenses become less flexible 24 Red eye in photographs comes from 25 Red eye demonstrates a Light is a wave b Air absorbs blue more than red c Camera film is sensitive to red d The eye is a retro reflector 26 Your eye has a One lens called the lens b Two lenses the lens and the cornea c Two lenses the lens and the retina d No lenses but behaves like a pinhole camera 27 Light is polarized when it bounces off a Water b Glass c air 28 Sunglasses can help you see a fish underwater because a Reflected light is polarized b Light from the fish is polarized c They dim they light making your pupils dilate a The film detecting IR b Poor focus on the eye c Light of the flash reflecting off the retina the back of the eye d Light of the flash reflecting off the cornea the surface of the eye d They cut the blue light of the water surface 29 Polaroids are used for 3 D movies because a They reduce glare from the surface b They give a different image to each eye c They polarize the light d They reduce the dispersion 30 Stress in plastic can be detected by looking at a The transmission of different colars b The reflection of different colors c d Polarized light crossed polaroids 31 In a pinhole camera more blurring occurs if interference a The hole is made very large but not if it is very small b The hole is made very small but not if it is made very large c The hole is either very large or very small d Never since there is no lens in a pinhole camera 32 Holograms depend on the fact that light a Contains red green and blue b c d Can be focused Is quantized Is a wave 33 A successful fisherman will throw the spear a Above the fish image b Below the fish image c Right at the fish image d It depends on how close the fish is 34 To make a spy satellite that can read a license plate you would have to a Put it in a higher orbit b Cover it with a polarizing filter c Use a larger mirror d Do nothing they already can read license plates 35 The wavelength of visible light is closest to diameter of a A human hair b A red blood cell c An atom d A nucleus 36 The Keck telescope is powerful because a b c d It gives larger magnification It can use UV light It has a bigger mirror to collect light It has a bigger focal length than others 37 When you say a man is color blind we usually mean that a Everything looks black and …
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