Physics 100: Week 9 - Knowledge Check Questions With
Complete Solutions
A changing electric field induces a changing
a. neither of these
b. electromagnetic field.
c. magnetic field.
d. both of these Correct Answers c. magnetic field.
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. Correct Answers c.
Moon passes into Earth's shadow.
A main difference between a radio wave and a light wave is
a. frequency.
b. wavelength.
c. both of these
d. neither of these Correct Answers c. both of these
A main difference between a radio wave and a sound wave is
a. frequency.
b. energy.
c. medium or no medium.
d. amplitude.
,e. wavelength. Correct Answers c. medium or no medium.
A new Moon appears in the sky just before the time of a
a. lunar eclipse.
b. neither of these
c. both of these
d. solar eclipse. Correct Answers d. solar eclipse.
A pair of sunglasses and a pair of clear reading glasses are left in
the sunlight. The hotter glasses will be the
a. reading glasses.
b. sunglasses.
c. neither of these
d. both of these Correct Answers b. sunglasses.
A partial solar eclipse occurs for people in the Sun's
a. none of these
b. umbra.
c. penumbra. Correct Answers c. penumbra.
A solar eclipse occurs when the
a. the Moon's shadow is cast on Earth.
b. None of these
c. Moon passes into Earth's shadow.
d. Sun passes into Earth's shadow. Correct Answers a. the
Moon's shadow is cast on Earth.
, A total shadow is called
a. an umbra, and a partial shadow a penumbra.
b. a penumbra, and a partial shadow an umbra.
c. neither of these Correct Answers a. an umbra, and a partial
shadow a penumbra.
A total solar eclipse occurs for people in the Sun's
a. umbra.
b. none of these
c. penumbra. Correct Answers a. umbra.
An annular eclipse of the Sun occurs when the Moon doesn't
quite cover the Sun in the zone of totality. This means that the
Moon is
a. farther than usual from Earth.
b. none of these
c. closer than usual to Earth. Correct Answers a. farther than
usual from Earth.
Colors are barely seen or not at all in nighttime because
moonlight
a. is too dim to activate the retina's cones.
b. is only semi-transparent in Earth's atmosphere.
c. has almost no colors in it.
d. photons don't have enough energy to activate the retina's
cones.
Complete Solutions
A changing electric field induces a changing
a. neither of these
b. electromagnetic field.
c. magnetic field.
d. both of these Correct Answers c. magnetic field.
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. Correct Answers c.
Moon passes into Earth's shadow.
A main difference between a radio wave and a light wave is
a. frequency.
b. wavelength.
c. both of these
d. neither of these Correct Answers c. both of these
A main difference between a radio wave and a sound wave is
a. frequency.
b. energy.
c. medium or no medium.
d. amplitude.
,e. wavelength. Correct Answers c. medium or no medium.
A new Moon appears in the sky just before the time of a
a. lunar eclipse.
b. neither of these
c. both of these
d. solar eclipse. Correct Answers d. solar eclipse.
A pair of sunglasses and a pair of clear reading glasses are left in
the sunlight. The hotter glasses will be the
a. reading glasses.
b. sunglasses.
c. neither of these
d. both of these Correct Answers b. sunglasses.
A partial solar eclipse occurs for people in the Sun's
a. none of these
b. umbra.
c. penumbra. Correct Answers c. penumbra.
A solar eclipse occurs when the
a. the Moon's shadow is cast on Earth.
b. None of these
c. Moon passes into Earth's shadow.
d. Sun passes into Earth's shadow. Correct Answers a. the
Moon's shadow is cast on Earth.
, A total shadow is called
a. an umbra, and a partial shadow a penumbra.
b. a penumbra, and a partial shadow an umbra.
c. neither of these Correct Answers a. an umbra, and a partial
shadow a penumbra.
A total solar eclipse occurs for people in the Sun's
a. umbra.
b. none of these
c. penumbra. Correct Answers a. umbra.
An annular eclipse of the Sun occurs when the Moon doesn't
quite cover the Sun in the zone of totality. This means that the
Moon is
a. farther than usual from Earth.
b. none of these
c. closer than usual to Earth. Correct Answers a. farther than
usual from Earth.
Colors are barely seen or not at all in nighttime because
moonlight
a. is too dim to activate the retina's cones.
b. is only semi-transparent in Earth's atmosphere.
c. has almost no colors in it.
d. photons don't have enough energy to activate the retina's
cones.
