Physics 101 test 3 ball state
Images formed by diverging lenses are _____________ upright.
always
plane mirror images are ______ virtual
always
The yellow clothes of a stage performer can be made to look black if illuminated only by light that is
blue
What color is a normally blue object when illuminated with magenta light?
blue
What color is a normally cyan object when illuminated with magenta light?
blue
What color is a normally magenta object when illuminated with blue light?
blue
Cyan light is really a mixture of
blue and green light
What color light is absorbed by a piece of magenta glass?
green
An insulator differs from a conductor in that an insulator
has fewer freely moving electrons
Balloons X, Y, and Z are suspended from strings as shown above. Negatively charged balloon X attracts balloon Y and balloon Y attracts balloon Z. Balloon Z ____.
may be neutral, positively charged, or negatively charged.
What color light is transmitted by a piece of red glass?
red
Which color of light has the longest wavelength in a vacuum?
red
Which color of light has the lowest frequency in a vacuum?
red
Since we know that like poles _____ and unlike poles _____, the north pole of the bar magnet must have magnetized the paper clip such that the top of the magnetic paper clip was its ____ pole.
repel, attract, south
A negatively charged rod is brought near a metal conductor. The electrons in the metal conductor experience a force of
repulsion
Images formed by converging lenses are _____________ the same size as the object.
sometimes
Images formed by converging lenses are _____________ virtual.
sometimes
images formed by converging lenses are _____________ upright.
sometimes
The electroscope detects
static electricity
Converging lenses are
thicker in the middle than at the edges
Which color of light has the greatest frequency in a vacuum?
violet
What color is a normally green object when illuminated with magenta light?
black
What color is a normally red object when illuminated with green light?
black
neutral object
An object that has equal numbers of protons and electrons
In the diagram above, the angle of incidence is _______ degrees.
60
Under what circumstance will the image formed by a converging lens will be real and enlarged?
When the object is between one and two focal lengths from the lens.
Under what circumstance will the image formed by a converging lens will be real?
When the object is greater than one focal length away from the lens.
Which color of light has the slowest speed in a vacuum?
all have the same speed in a vacuum
Charge carriers in a metal are electrons rather than protons because electrons are
all of these
An electric charge that results from the presence of a charged object nearby (no direct contact) is called
an induced charge
virtual images produced by mirrors
are always located behind the mirror
Real images produced by mirrors
are always located in front of the mirror.
Static electric charges are charges that
are stationary charges
A negatively charged rod is brought near a metal conductor. The protons in the metal conductor experience a force of
attraction
An opaque object is red when illuminated with white light. What color is it when viewed through a cyan transparency?
black
Upon entering the room, you observe two balloons suspended from the ceiling. You notice that instead of hanging straight down vertically, the balloons seems to be repelling each other. You can conclusively say ...
both balloons are charged with the same type of charge
A charge resulting from contact between objects is called
conduction
Convex lenses are also known as
converging lenses
An opaque object is green when illuminated with white light. What color is it when viewed through a blue transparency?
cyan
What color is a normally cyan object when illuminated with cyan light?
cyan
What color light is transmitted by a piece of cyan glass?
cyan
When the lights depicted above shine on the screen, the paper appears...
cyan
A sheet of red paper will look black when illuminated with
cyan light
Which atomic particle carries a negative charge
electron
A positively charged rod is brought near a metal conductor. Which, if any, particles move toward the rod?
electrons
What happens when a positively charged rod is brought near a neutral plastic ball?
electrons in the ball are attracted to the near side of the ball
A negative ion has more
electrons than protons
Materials which readily do this are known as ___. They easily become magnetized when they are placed in a magnetic field.
ferromagnetic substance
Different colors of light correspond to different light
frequencies
What color is a normally yellow object when illuminated with green light?
green
If this bar magnet is turned around, it will still pick up this same paperclip because ___.
it always magnetized opposite pole near to it
The reason a bar magnet can pick up an unmagnetized paper clip is that _____.
it induces opposite pole near to it
The basic law of magnetism is that
like poles repel and unlike poles attract
If sunlight were green instead of white, the most comfortable color to wear on a cold day would be
magenta
The complementary color of green is
magenta
Magnetic fields only interact with other magnetic fields (i.e., magnets only attract or repel other magnets), so in order for a permanent magnet to attract an object, the magnetic field surrounding the permanent magnet must ______ the object.
magnetized
Rub a plastic straw on your cotton shirt and the straw becomes
negatively charged
Images formed by diverging lenses are _____________ enlarged.
never
Images formed by diverging lenses are _____________ real.
never
plane mirror images are ____ real
never
plane mirror images are ______ reduced
never
plane mirror images are ________ enlarged
never
A negatively charged rod is brought near a metal conductor. The neutrons in the metal conductor experience a force of
no force at all
Rub a balloon with fur and the fur becomes
positively charged
Complementary colors are two colors that
produce white light when added together
A positive ion has more
protons than electrons
What color is a normally red object when illuminated with magenta light?
red
What color is a normally red object when illuminated with yellow light?
red
What color light is absorbed by a piece of blue glass?
yellow
the complementary color of blue is
yellow
