Quiz 4, WX 201, Quiz 3 WX 201, Quiz 2 WX 201, Quiz 1 WX 201 ||
Solved Correctly.
Twilight is the name given to the time ____, when the sky remains illuminated and allows
outdoor activities without artificial lighting.
- after sunset and immediately after sunrise
- after sunset and immediately before sunrise
- before sunset and immediately before sunrise
- around sunset
- before sunset and immediately after sunrise correct answers after sunset and immediately
before sunrise
Air molecules selectively scatter visible light because ____.
- they are unable to absorb electromagnetic waves
- they are the same size as the wavelength of visible light
- they are smaller than the wavelength of visible light
- they are much larger than the wavelength of visible light
- the electrons that orbit around the nucleus of atoms have a blue color correct answers they are
smaller than the wavelength of visible light
White light is perceived when ____ strike the cones of the eye with nearly equal intensity.
- a single long wavelength
- a single short wavelength
- all visible wavelengths
- all short wavelengths
,- all long wavelengths correct answers all visible wavelengths
The blue color of distant mountains is due primarily to ____.
- emission of light
- scattering of light
- diffraction of light
- refraction of light
- absorption of light correct answers scattering of light
The Sun radiates almost half of its energy as visible light.
- False
- True correct answers True
When stars appear to twinkle or flicker, it is a condition known as ____.
- fluctuation
- scintillation
- iridescence
- shimmering
- glorification correct answers scintillation
When the atmosphere becomes loaded with particles, only the longest red wavelengths are able
to penetrate the atmosphere, so we see a red Sun.
- False
,- True correct answers True
What color would the sky be if air molecules selectively scattered only the longest wavelengths
of visible light?
- violet
- blue
- red
- white
- black correct answers red
The blue color of the sky is due to ____.
- transmission of visible light through the ozone layer in Earth's stratosphere
- selective scattering of visible light by air molecules
- absorption of short wavelengths by air molecules
- the filtering effect of water vapor in Earth's atmosphere
- reflection of sunlight off Earth's oceans correct answers selective scattering of visible light by
air molecules
At sunset in the middle latitudes, look for a rainbow toward the ____.
- east
- northwest
- south
- west
- southwest correct answers east
, Plants appear green to us because they ____.
- reflect blue wavelengths
- absorb all visible wavelengths
- reflect green wavelengths
- reflect all visible wavelengths
- absorb green wavelengths correct answers reflect green wavelengths
Secondary rainbows occur when ____.
- the Sun disappears behind a cloud and then reappears.
- light refracts through a cloud of large raindrops.
- light refracts through ice crystals.
- a single internal reflection of light occurs in raindrops.
- two internal reflections of light occur in raindrops. correct answers two internal reflections of
light occur in raindrops.
Red sunsets, blue moons, and milky-white skies are mainly the result of ____.
- refraction
- scattering
- dispersion
- reflection
- diffraction correct answers scattering
The sky will begin to turn milky white ____.
Solved Correctly.
Twilight is the name given to the time ____, when the sky remains illuminated and allows
outdoor activities without artificial lighting.
- after sunset and immediately after sunrise
- after sunset and immediately before sunrise
- before sunset and immediately before sunrise
- around sunset
- before sunset and immediately after sunrise correct answers after sunset and immediately
before sunrise
Air molecules selectively scatter visible light because ____.
- they are unable to absorb electromagnetic waves
- they are the same size as the wavelength of visible light
- they are smaller than the wavelength of visible light
- they are much larger than the wavelength of visible light
- the electrons that orbit around the nucleus of atoms have a blue color correct answers they are
smaller than the wavelength of visible light
White light is perceived when ____ strike the cones of the eye with nearly equal intensity.
- a single long wavelength
- a single short wavelength
- all visible wavelengths
- all short wavelengths
,- all long wavelengths correct answers all visible wavelengths
The blue color of distant mountains is due primarily to ____.
- emission of light
- scattering of light
- diffraction of light
- refraction of light
- absorption of light correct answers scattering of light
The Sun radiates almost half of its energy as visible light.
- False
- True correct answers True
When stars appear to twinkle or flicker, it is a condition known as ____.
- fluctuation
- scintillation
- iridescence
- shimmering
- glorification correct answers scintillation
When the atmosphere becomes loaded with particles, only the longest red wavelengths are able
to penetrate the atmosphere, so we see a red Sun.
- False
,- True correct answers True
What color would the sky be if air molecules selectively scattered only the longest wavelengths
of visible light?
- violet
- blue
- red
- white
- black correct answers red
The blue color of the sky is due to ____.
- transmission of visible light through the ozone layer in Earth's stratosphere
- selective scattering of visible light by air molecules
- absorption of short wavelengths by air molecules
- the filtering effect of water vapor in Earth's atmosphere
- reflection of sunlight off Earth's oceans correct answers selective scattering of visible light by
air molecules
At sunset in the middle latitudes, look for a rainbow toward the ____.
- east
- northwest
- south
- west
- southwest correct answers east
, Plants appear green to us because they ____.
- reflect blue wavelengths
- absorb all visible wavelengths
- reflect green wavelengths
- reflect all visible wavelengths
- absorb green wavelengths correct answers reflect green wavelengths
Secondary rainbows occur when ____.
- the Sun disappears behind a cloud and then reappears.
- light refracts through a cloud of large raindrops.
- light refracts through ice crystals.
- a single internal reflection of light occurs in raindrops.
- two internal reflections of light occur in raindrops. correct answers two internal reflections of
light occur in raindrops.
Red sunsets, blue moons, and milky-white skies are mainly the result of ____.
- refraction
- scattering
- dispersion
- reflection
- diffraction correct answers scattering
The sky will begin to turn milky white ____.
