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PHY1020-Chapter 8

QuestionAnswer
an indication that light is a wave is: That it reflects off surfaces.
The colors of an oil slick indicate that: Light is a wave.
The index of refraction measures: The speed of light.
Light waves are: Transverse.
The resolution of a human eye is about: 1/60 degree
Which of the following has the lowest index of refraction? ~Water ~Glass ~Air ~Crystal Air
As the wavelength of light decreases, the frequency: Increases.
In one millionth of a second, light will travel: About 1000 feet.
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: 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: Small glass spheres
Diamonds sparkle in may colors because: Light travels very fast.
Which of the following are retroflectors? ~Bicycle reflectors ~Human eyes ~Stop signs ~Animal eyes ~Bicycle reflectors ~Human eyes ~Stop signs ~Animal eyes
Two soap bubbles from the same soap appear to be different colors. They probably have: Different thicknesses
If c is the speed of light in vacuum, then the speed of light in glass is approximately: (2/3)c
Stealth bombers are undetected by radar, in part because: Of their absence of corner reflectors.
Rainbows have different colors because: The direction of light spreads because the wavelength is short.
Which of the following is polarized? ~Blue sky light ~Direct sunlight (yellow) ~Light from a candle ~Light from a TV screen Direct sunlight (yellow)
A fiber can send much more information per second than a wire because: Light travels faster than electricity.
Which color of light would give the highest number of bits per second in fiber optics? Red
Shannon is famous for having invented or discovered (among other things): The bit.
The human eye has cones that detect: Green, blue, red.
People squint to see better because squinting: Reduces the light.
Old people need reading glasses because their: Lenses become less flexible.
Red-eye in photographs comes from: Light of the flash reflecting off the retina (the back of the eye).
Red-eye demonstrates that: The eye is a retroflector
Your eye has: 2 lenses-- the lens and the cornea.
Light is polarized when it bounces off (choose all that are correct): ~Water ~Glass ~Air ~Water ~Glass ~Air
Sunglasses can help you see a fish underwater because: Reflected light is polarized
Polaroids are used for 3-D movies because: They give a different image to each eye
Stress in plastic can be detected by looking at: Polarized light (crossed polaroids)
In the pinhole camera, more blurring occurs if: The hole is made very large (but not if it is very small)
Holograms depend on the fact that light: Is a wave
A successful fisherman will throw the spear: Below the fish image
TO make a spy satellite that can read a license plate, you would have to: Use a larger mirror
The wavelength of visible light is close to the diameter of: A red blood cell
The Keck telescope is "powerful" because: It has a bigger mirror to collect light
When we say a man is color blind, we usually mean that: He can't distinguish red from green.
The Keck uses what to focus light? A mirror.
Light in a vacuum goes 1 foot every nanosecond (billionth of a second). In water, in one nanosecond it will go about 0.66 foot
Present-day 3-D movies make use of which technology? Polarizers
A computer screen does not have spots that are colored: White.
For a good telescope (like Hubble), in geosynchronous orbit (HEO), a typical resolution (for objects on the surface) is about: 4 inches.
A major use for fiber optics is for: Communication
Created by: SilhouetteXD
 

 



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