Physical Science 1118 self test

focal distance

h.

focal point

i.

a. convex lens, c. concave mirror

image inverted

b. concave lens, d. convex mirror, e. plane mirror

image upright

e. can travel through a medium or a vacuum

light waves

q. magnetic rock

lodestone

u. area of influence around a magnet

magnetic field

i. must travel through a medium

mechanical waves

j. light consists of tiny particles

particle theory of light

b. emission of electrons when a substance is exposed to light

photoelectric effect

k. quantum of light energy

photon

o. piece of solid, transparent glass with triangular ends and rectangular sides and bottom

prism

g. discrete packet of energy

quantum

r. light consists of photons which release energy in waves

quantum theory of light

a. convex lens, c. concave mirror

rays converge

b. concave lens, d. convex mirror

rays diverge

e. plane mirror

rays reflect at same angle

a. convex lens, c. concave mirror

real image

d. transmission of light energy in straight, parallel rays

rectilinear propagation

Like magnetic poles repel one another.

second law of magnetism

v. magenta, cyan, and yellow pigments

subtractive primary colors

Unlike magnetic poles attract one another

third law of magnetism

mirage

A ____________________ is the seeming appearance of an object where it is not because of light refraction.

high, short

A specific frequency and wavelength cannot be assigned to each color of visible light because visible light has ________________ frequencies and ________________ wavelengths.

field

According to the electromagnetic theory, an electromagnetic ____________________ provides the medium through which light waves move.

f. light

After creating Earth God made

estimates

Astronomical distances are not used to determine the speed of light because they are only _______________________.

g. b, c, and d

Because of polarity, _________.

additive, subractive

Combining the three _______________________ primary colors produces white light; combining the three ____________________ primary colors produces black pigment.

velocity

Early scientists were hampered in their study of light because they could not measure its _______________.

electrical, magnetic

Electrons emit both ______________________ energy and _________________ energy as they jump to lower energy levels.

unpaired

Ferromagnetic metals are easily magnetized because they contain _______________ electrons.

polorizing

Glare can be greatly eliminated by the use of optical _________________ filters in sunglass lenses.

white light

If a second prism, which has been inverted, intercepts the light from the first prism, the visible spectrum is blended back into _______________________.

reflect

If an object does not _____________________ light, it is invisible.

visible spectrum

If sunlight is allowed to strike a prism, the colored bands of the __________________________ can be seen.

refraction

Light ___________________ is caused by the change in the velocity of light as it passes from one medium into another.

waves, particles

Light is not completely understood, even by modern scientists, because light sometimes behaves like ___________________ of energy and other times light behaves as ______________________ radiating out in straight lines.

parallel

Light reflected from objects does not consist of _____________________ rays.

virtual

The _____________________ image of a plane mirror appears to be behind or inside the glass.

polarity

The ______________________ of an electron is determined by the direction of its spin.

distance

The force of a magnetic field decreases with ____________________.

reflection

The law of reflection states that the angle of ___________________ equals the angle of incidence.

decreases

The velocity of light ______________ when it moves from one medium to one of greater density.

Blue

_________________ pigment absorbs all the incoming colors of light except blue and reflects blue light.

regular

____________________ reflection is the reflection of all light rays at the same angle from a completely flat, even surface.

diffused

_______________________ reflection is the spreading out in all directions of waves reflected at various angles from an uneven surface.

glare, unpolorized

__________________________ results when _________________ light reflects from nearby objects and enters your eyes from different directions.

convex lens

a.

p. red, green, and blue light

additive primary colors

concave lens

b.

concave mirror

c.

h. two colors of light that produce white light when combined

complementary colors

plane mirror

d.

t. repelled by a magnet

diamagnetic

s. microscopic cluster of magnetic atoms

domain

convex mirror

e.

w. light consists of waves of electrical and magnetic energy emitted from electrons

electromagnetic theory of light

m. six colors of he visible spectrum

elementary colors

virtual focal point

f.

n. strongly attracted to a magnet

ferromagnetic

Either pole of a magnet attracts a nonmagnetic, ferromagnetic substance.

first law of magnetism

virtual focal distance

g.

l. 299,792.458 km/sec

velocity of light in vacuum

b. concave lens, d. convex mirror, e. plane mirror

virtual image

a. a band of colors of light perceivable by human eyes

visible spectrum

c. light consists of waves of energy emitted from a source

wave theory of light