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.
