PHY1020-Chapter 9
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| Which of the following has the highest frequency? ~Gamma rays ~UV ~IR ~Microwaves | Gamma rays
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| Which of the following has the lowest frequency? ~TV ~AM radio ~Visible light ~Gamma rays | AM Radio
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| If you double the absolute temperature of an object, the wavelength of emitted light: | GEts shorter by a factor of 16
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| Which kind of light has the longest wavelength? ~Red light ~Blue light ~Infrared light ~Ultraviolet light | Infrared light
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| Invisible light includes: | x-rays, UV, and IR
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| As an object gets hotter and hotter, the color of its glow will change from: | Red, to yellow, to white, to blue
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| Radio waves and x-rays have the: | Same speed.
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| If you double the absolute temperature, the total radiation: | Increases by 16
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| Most of the energy of an ordinary tungsten-filament lightbulb is emitted in the color: | Red.
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| Heat radiation is also called: | IR
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| A tungsten lightbulb has 100 watts printed on it. About how much power is emitted as visible light? | 16 watts
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| Which color star would be the hottest ~Blue ~Red ~Orange ~White | Blue
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| Sunlight is brightest in which color? | IR
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| Which of the following exposes people to the kind of radiation that can cause cancer?: ~computer-aided tomography (CAT) scans ~magnetic resonance imaging (MRI) ~Positron-emission tomography (PET) ~thermography | Computer-aided tomography (CAT) scans
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| Because of their warmth, humans primarily emit: | Infrared radiation
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| If you sleep under a tree, you won't get wet from morning dew. That's because the tree: | Emits infrared radiation
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| Dew forms when the ground cools: | By emitting IR
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| A "heat-seeking" missile actually aims itself toward: | Infrared light
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| The ozone layer is created by and absorbs: | Ultraviolet radiation
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| Ozone depletion is caused by: | CFCs
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| A few years ago, a certain kind of spray can was banned. These were the cans that used: | Chlorofluorocarbons (CFCs)
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| Multispectral refers to: | UV, IR, and visible
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| The name NMR has been changed to: | MRI
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| Which of the statements about the ozone layer is not true? | Ozone is the most important greenhouse gas
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| The clouds in thunderstorms rise until they reach: | The ozone layer
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| The original name for the microwave oven was: | Radar range
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| Microwave ovens use radiation with a wavelength: | Same as radar
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| The microwaves in a microwave oven mostly heat: | Water
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| MRI maps the distribution of which element to produce an image? | Hydrogen
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| UV light: | ~Is responsible for sunburns and windburns
~Is used to kill bacteria in the water of remote villages in India
~Is also called black light
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| Which of the following is the best for seeing calcium in bones? | x-ray
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| A black light is designed to emit: | UV
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| A positron is: | An antielectron
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| Sunburn is usually caused by: | UV radiation:
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| Which of the following uses antimatter? ~CAT scan ~MRI ~PET scan ~x-ray | PET scan
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| To image hydrogen in the body, use: | MRI
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| What is the cause for "windburn"? | Solar UV
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| Remote control of a TV is usually done using: | IR
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| Pit vipers and mosquitos can sense: | IR radiation
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| Infrared radiation can: | Help snakes locate prey
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| Cancer is most likely to be caused by: | Ultraviolet radiation
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| The advertising slogan "whiter than white" means that the material: | Emits visible light
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| To make clothes appear extra clean, manufacturers apply: | Fluorescent dyes
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| Which of the following is a typical energy for an x-ray? | 50,000 eV
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| In total darkness, you can see people if you have a camera that is sensitive to | Infrared radiation
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| Cell phones emit | Microwaves
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| Each of these make use of infrared radiation except | Measurement of wave velocities in the ocean.
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| Bats navigate in caves by using | Ultrasound.
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| The phosphor of a fluorescent lightbulb turns which of these into visble light? | Ultraviolet light
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| "Cool roofs" | Must reflect infrared.
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| The best kind of radiation to purify water is | UV
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| Which of the following are electromagnetic waves? ~Radar ~Visible Light ~UV ~X-rays | ~Visible Light ~UV ~X-rays
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| To image hydrogen in the brain, the best technique: | MRI
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| Which of the following is an advanced methos that uses x-rays? | CAT
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