Physics 100: Week 9 - Knowledge Check With 65
Ques ons and answers Newest RATED A+
Which best shields you from sunburn when at the beach?
a. All of these
b. a cloudy day
c. a sheet of glass between you and the Sun
d. frequent turning of your body
e. None of these
c. a sheet of glass between you and the Sun
Which of these electromagne c waves have the shortest wavelength?
a. X-rays
b. light waves
c. radio waves
d. ultraviolet waves
e. infrared waves
a. X-rays
Which travels with the greatest speed in a vacuum?
a. radio waves
b. light waves
c. gamma rays
d. all have the same speed
e. X-rays
d. all have the same speed
The cones in the re na of the eye are
a. concentrated along the periphery of vision.
b. uniformly spread along the visual field.
c. most densely packed at the center of vision.
, c. most densely packed at the center of vision.
What is the wavelength of a 1-hertz electromagne c wave?
a. more than 1 m
b. 1 m
c. less than 1 m
a. more than 1 m
Glass is transparent to wave frequencies that
a. match its natural frequencies.
b. both of these
c. are below its natural frequencies.
d. neither of these
c. are below its natural frequencies.
Compared to ultraviolet waves, the wavelength of infrared waves is
a. shorter.
b. the same.
c. longer.
c. longer.
A lunar eclipse occurs when the
a. Sun passes into Earth's shadow.
b. Earth passes into the Moon's shadow.
c. Moon passes into Earth's shadow.
d. Earth passes into the Sun's shadow.
c. Moon passes into Earth's shadow.
Red-hot and blue-hot stars appear white to the eye because
a. the eye has difficulty seeing color at night.
b. they are overwhelmed by the blackness of the nigh.me sky.
c. eye recep vity peaks in the yellow-green part of the spectrum.
d. they are too dim to fire the cones.
e. they are too dim to fire the rods.
Ques ons and answers Newest RATED A+
Which best shields you from sunburn when at the beach?
a. All of these
b. a cloudy day
c. a sheet of glass between you and the Sun
d. frequent turning of your body
e. None of these
c. a sheet of glass between you and the Sun
Which of these electromagne c waves have the shortest wavelength?
a. X-rays
b. light waves
c. radio waves
d. ultraviolet waves
e. infrared waves
a. X-rays
Which travels with the greatest speed in a vacuum?
a. radio waves
b. light waves
c. gamma rays
d. all have the same speed
e. X-rays
d. all have the same speed
The cones in the re na of the eye are
a. concentrated along the periphery of vision.
b. uniformly spread along the visual field.
c. most densely packed at the center of vision.
, c. most densely packed at the center of vision.
What is the wavelength of a 1-hertz electromagne c wave?
a. more than 1 m
b. 1 m
c. less than 1 m
a. more than 1 m
Glass is transparent to wave frequencies that
a. match its natural frequencies.
b. both of these
c. are below its natural frequencies.
d. neither of these
c. are below its natural frequencies.
Compared to ultraviolet waves, the wavelength of infrared waves is
a. shorter.
b. the same.
c. longer.
c. longer.
A lunar eclipse occurs when the
a. Sun passes into Earth's shadow.
b. Earth passes into the Moon's shadow.
c. Moon passes into Earth's shadow.
d. Earth passes into the Sun's shadow.
c. Moon passes into Earth's shadow.
Red-hot and blue-hot stars appear white to the eye because
a. the eye has difficulty seeing color at night.
b. they are overwhelmed by the blackness of the nigh.me sky.
c. eye recep vity peaks in the yellow-green part of the spectrum.
d. they are too dim to fire the cones.
e. they are too dim to fire the rods.
