An indication that light is a wave is a that it has dark bands in the diffraction pattern b that it passes though glass c that it reflects off surfaces d its high speed that it has dark bands in the diffraction pattern The colors of an oil stick 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 light is a wave 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 the speed of light Light waves are a longitudinal b transverse c circular Transverse The resolution of a human eye is about a 4mm b 2cm c 1 micron d 1 60 degree 1 60 degree Which of the following has the lowest index of refraction a water b glass c air d crystal Air As the wavelength of light decreases the frequency a decreases b increases c stays the same increases In one millionth of a second light will travel a about 1 ft b about 1000 ft c from one side of a computer chip to the other d from the Earth to the Moon about 1000 ft 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 in a direction that is tilted upward c in a direction that is tilted downward in a direction that is tilted downward so it will eventually hit the ground A stop sign is bright when you shine the headlamps of your car on it It most likely is covered with a flourescent paint b phosphorescent paint c tritium d small glass spheres small glass spheres Diamonds sparkle in many colors because a light travels very slowly b light travels very fast c there is color dependent absorption d the velocity depends on color the velocity depends on the color Which of the following are retroreflectors a bicycle reflectors b human eyes c stop signs d animal eyes e all of the above all of the above Two soap bubbles from the same soap appear to be different colors They probably have a different sizes b different absorption c different temperature d different thickness different thickness If c is the speed of light in vacuum then the speed of light in glass is approximately a 1 5c b 2 3 c c c d 0 999 c 2 3 c Stealth bombers are indetected 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 abscence of corner reflectors The absence of corner reflectors Rainbows show different colors because a droplets of water have different sizes b in water different frequencies have different velocities c the direction of light spreads because the wavelength is short d droplets of water change the color of air molecules in water different frequencies have different velocities Which of the following is polarized a blue sky light b direct sunlight c light from a candle d light from a TV screen Blue sky light 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 from a TV screen light has a very high frequency Which color of light would give the highest number of bits per second in fiber optics a red b white c blue d infrared blue The bit Shannon is famous for having invented or discovered a GPS b Global Hawk c the sound channed d the bit The human eye had cones that detect a red yellow blue b cyan magenta yellow c yellow green red d green blue red green blue red 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 that they do reduces the blur size Old people need reading glasses because their a pupils can t contract as well b eyes become less sensitive to visible light c lenses become less flexible d they forget how to read lenses become less flexible Red eye in photographs comes from a the film detecting IR b poor focus on the eye c light of the flash reflecting off the retina d light of the flash reflecting off the cornea light of the flash reflecting off the retina Red eye demonstrates that a light is a wave b air absorbs blue more than red c camera film is sensitive to red d the eye is a retroreflector the eye is a retroreflector Your eye has a on 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 two lenses the lens and the cornea Light is polarized when it bounces off a water b glass c air All of the above Sunglasses can help you see a fish underwater because a reflected light is polarized b light from the fish is polarized c they dim the light making your pupils dilate d they but the blue light of the water surface reflected light is polarized 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 they give a different image to each eye Stress in plastic can be detected by looking at a the transmission of different colors b the reflection of different colors c interference d polarized light polarized light crossed polaroids In the pinhole camera more building occurs if a the hole is made very large but not if it is very small b the hole is made very small not if made large c the hole is either very large or very small d Never since there is no lens in a pinhole camera the hole is either very large or very small Holograms depend on the fact that light a contains red green and blue b is quantized c is a wave d can be focused Is a wave 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 below the fish image 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 use a larger mirror The …
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