Chapter 9 Flashcards
Which of the following has the highest frequency?
a. gamma rays
b. uv
c. IR
d. micowaves
a. gamma rays
Which of the following has the lowest frequency?
a. TV
b. Am radio
c. visible light
d. gamma rays
b. Am radio
If you double the absolute temperature of an object, the wavelength of the emitted light
a. gets longer by a factor of 2
b. gets longer by a factor of 16
c. gets shorter by a factor of 2
d. gets shorter by a factor of 16
c. gets shorter by a factor of 2
Which kind of light has the longest wavelength?
a. red light
b. blue light
c. infrared light
d. ultraviolet light
c. infrared light
Invisible light includes
a. Uv, quarks, and gluons
b. x-rays, Uv, and IR
c. blue, alterable, and ultra red
d. quanta, anti white, and photons
b. x-rays, Uv, and IR
As an object gets hotter and hotter, the color of its glow will change
a. white to yellow to red to blue
b. baut to white to yellow to red
c. red to yellow to white to blue
d. yellow to white to blue to red
e. none of the above
c. red to yellow to white to blue
Radio waves and x-rays have the
a. same frequency
b. same speed
c. same wave length
d. same energy
e. none of the above
b. same speed
If you double the absolute temperature, the total radiation
a. is reduced to half
b. doubles
c. increases by 4
d. increases by 16
d. increases by 16
Most of the energy of an ordinary tungsten-filament lightbulb is emitted in the color
a. ultraviolet
b. green
c. red
d. infrared
c. red
infrared isn’t a color - in this question
Heat radiation is also called
a. IR
b. UV
c. white light
d. gamma rays
a. IR
A tungsten lightbulb has 100 watts printed on it. About how much power is actually emitted a visible light?
a. 16 watts
b. 40 watts
c. 100 watts
d. 220 watts
a. 16 watts
Which color star would be the hottest?
a. blue
b. red
c. orange
d. white
a. blue
Sunlight is brightest in which color?
a. Uv
b. red
c. green
d. blue
e. IR
c. green
Which of the following exposes a person to the kind of radiation that can cause cancer?
a. Computer-aided tomography (CAT scans)
b. magnetic resonance imaging (MRI)
c. positron-emission tomography (PET)
d. thermography
a. Computer-aided tomography (CAT scans)
c. positron-emission tomography (PET)
Because of their warmth, humans emit primarily
a. sonic radiation
b. infrared radiation
c. ultraviolet radiation
d. visible radiation
b. infrared radiation
If you sleep under a tree, you won’t get wet from morning dew. That’s because the tree
a. absorbs starlight
b. keeps air from rising
c. emits infrared radiation
d. blocks the clouds
c. emits infrared radiation
Dew forms when the ground cools
a. by emitting UV
b. by emitting IR
c. by emitting visible light
d. by conduction downward
b. by emitting IR
A “heat-seeking” missile actually aims itself toward
a. infrared light
b. ultraviolet light
c. visible light
d. radio waves
a. infrared light
The ozone layer is created by and absorbs:
a. CFCs (chlorofluorocarbons)
b. carbon dioxide from fossil fuels
c. cosmic rays
d. ultraviolet radiation
d. ultraviolet radiation
Ozone depletion is caused by (choose all that are correct)
a. CFC’s
b. carbon dioxide
c. fossil fuels
d. cosmic rays
a. CFC’s
A few years ago, a certain kind of spray can was banned. These were the cans that used
a. chlorofluorocarbons (CFC’s)
b. carbon dioxide
c. ozone
d. they were never banned
a. chlorofluorocarbons (CFC’s)
Multispectral refers to
a. uv, ir, and visible
b. the many colors in visible light
c. uv, ir, and x rays
d. ‘whiter than white’
b. the many colors in visible light
The name NMR has been changed to
a. CAT
b. MRI
c. ultrasound
d. PET
b. MRI
Which of the following statements about the ozone layer is not true?
a. the location of the ozone layer is the tropopause
b. the ozone layer causes thunderstorms to spread laterally.
c. ozone is destroyed by chlorine (e.g., from rein and other CFCs)
d. Ozone is the most important greenhouse gas.
d. Ozone is the most important greenhouse gas.
The clouds in thunderstorms rise until they reach
a. the carbon dioxide layer
b. the sic layer
c. the top of the atmosphere
d. the ozone layer
d. the ozone layer
The original name for the microwave oven was
a. convection oven
b. radar range
c. radio oven
d. microwave
b. radar range
Microwave ovens use radiation with a wavelength
a. . about one micron
b. same as radar
c. same as lasers
d. same as AM or FM radios
b. same as radar
The microwave in a microwave oven mostly heat
a. carbon
b. air
c. water
d. oxygen
c. water
MRI maps the distribution of which element to produce an image
a. iodine
b. carbon
c. calcium
d. hydrogen
d. hydrogen
UV light (Choose all that are correct)
a. is responsible for sunburns and windburns
b. is used to kill bacteria in the water of remote villages in India
c. is also called back light
d. is also called heat radiation
a. is responsible for sunburns and windburns
b. is used to kill bacteria in the water of remote villages in India
c. is also called back light
Which of the following is best for seeing the calcium in bones?
a. X-rays
b. MRI
c. PET scan
d. EEG
a. X-rays
A black light is designed to emit
a. UV
b. IR
c. radio waves
d. x- rays
a. UV
A positron is
a. an antielectron
b. the same as an electron
c. a kind of quark
d. a hypothesized star
a. an antielectron
Sunburn is usually caused by
a. UV radiation
b. IR radiation
c. X radiation
d. gamma radiation
e. visible light
f. all of the above
a. UV radiation
Which of the following uses antimatter?
a. CAT scan
b. MRI
c. PET scan
d. x-ray
c. PET scan
To image the hydrogen in the body, use
a. PET
b. MRI
c. CAT
d. X-rays
b. MRI
What is the cause for “windburn”?
a. cold from the wind
b. friction from wind
c. solar uv
d. solar IR
c. solar uv
Remote control lof a TV is usually done using
a. UV
b. IR
c. Microwaves
d. Xrays
b. IR
Pit vipers and mosquitoes can sense
a. uv radiation
b. ir radiation
c. gamma rays
d. microwaves
b. ir radiation
Infrared radiation can (choose all that apply)
a. help snakes locate prey
b. create ozone
c. cause cancer
d. cause sunburn
a. help snakes locate prey
Cancer is most likely to be caused by
a. infrared radiation
b. microwave radiation
c. ultraviolet radiation
d. white light
b. microwave radiation
The advertising slogan “whiter than white” means that the material
a. emits ir
b. emits visible light
c. absorbs IR
d. emits uv
b. emits visible light
To make clothes appear extra clean, manufacturers apply
a. infrared radiation
b. electron beam
c. ultraviolet radiation
d. fluorescent dyes
d. fluorescent dyes
Which of the following is a typical energy for an x-ray?
a. 1 eV
b. 1000 eV
c. 50,000 eV
d. 1,000,000 eV
c. 50,000 eV
In total darkness, you can see people if you have a camera that is sensitive to
a. ultraviolet radiation
b. infrared radiation
c. gamma radiation
d. far ultraviolet radiation
b. infrared radiation
Cell phones emit
a. microwaves
b. x-rays
c. gamma rays
d. P waves
a. microwaves
Each of these make use on infrared radiation except
a. capturing illegal immigrants
b. military “night vision”
c. measurement of wave velocities in the ocean
d. using trees to keep morning dew off campers
c. measurement of wave velocities in the ocean
Bats navigate in caves by using
a. ultrasound
b. IR
c. black light
d. radar
a. ultrasound
The phosphor of a fluorescent lightbulb turns which of these into visible light?
a. x-rays
b. infrared light
c. ultraviolet light
d. alpha rays
c. ultraviolet light
“Cool roofs”
a. must be white in the visible
b. must reflect infrared
c. must be brown in the visible
d. do not absorbs UV
b. must reflect infrared
The best kind of radiation to purify water is
a. visible
b. IR
c. UV
d. microwave
c. UV
Which of the following are electromagnetic waves? choose all that are appropriate
a. radar
b. visible light
c. uv
d. X-rays
a. radar
b. visible light
c. uv
d. X-rays
To image hydrogen in the brain, the best technique is
a. MRI
b. CAT
c. PET
d. x-ray
a. MRI
Which of the following is an advanced method that uses x-rays?
a. MRI
b. PET
c. CAT
d. SAR
c. CAT
