Transcript Light waves Review

A review for the quiz
Sound waves from a radio generally travel in which
medium?
a) air
b) light
c) earth
d) water
Our eyes can detect light only
within a range of _____ called
visible light.
a) frequencies
b) mediums
c) speeds
d) periods
The speed of a sound wave
a) depends on wavelength.
b) depends on amplitude.
c) depends on the medium.
d) None of the above
Longitudinal waves travel quickly in a _____ because
the molecules are closely packed and physically bonded
together.
a) liquid
b) solid
c) gas
d) None of the above
The differences in color in
visible light, such as those in a
rainbow, are caused by
differences in
a) amplitude.
b) medium.
c) speed.
d) frequency.
Light waves
a) require a medium.
b) cannot travel through
liquids.
c) cannot travel through solids.
d) are electromagnetic waves.
Light waves are
a)
b)
c)
d)
transverse waves.
rotating waves.
longitudinal waves.
circular waves.
The color of light is determined by the _____ of the light
waves.
a) medium
b) frequency
c) speed
d) amplitude
Which type of electromagnetic waves has the highest
energy?
a) gamma rays
b) infrared
c) ultraviolet light
d) microwaves
Which type of electromagnetic radiation is used to kill
cancer cells?
a) microwaves
b) ultraviolet rays
c) gamma rays
d) sunlight
Radar works by sending a
signal out from an air-traffic
control tower that is
analyzed by a Doppler
scanner on the ground.
b) reflected off a plane back to
the control tower.
c) increased in intensity as it
passes through the
atmosphere.
d) scanned and analyzed by a
receiver on board an airplane.
a)
The color that an object appears
to be depends on the
angle at which visible light
is reflected off the object.
b) use of additive rather than
subtractive colors.
c) wavelengths of visible light
that reaches your eyes.
d) speed with which visible
light reaches it.
a)
When light moves from a material in which its speed is
higher to a material in which its speed is lower, it is
a)
b)
c)
d)
bent toward the normal.
reflected off the boundary.
bent away from the normal.
changed into a virtual image.
Light rays that pass through a
lens change direction because
of internal reflection.
they are refracted.
light is broken up into many
different colors.
d) virtual images always
appear slightly larger than real
images.
a)
b)
c)
Light demonstrates wave characteristics when it is
a) reflected.
b) diffracted.
c) refracted.
d) All of the above
Light demonstrates particle characteristics when it
a) knocks electrons off a metal surface.
b) forms standing waves.
c) passes through a narrow opening.
d) All of the above
As the frequency of light waves increases,
a) the energy increases.
b) the energy stays the same.
c) the energy decreases.
d) the wavelength increases.
Light rays reflecting off a rough surface reflect
a) diffusely.
b) at all angles.
c) at a single angle.
d) None of the above
The law of reflection says the angle of incidence is
_____ the angle of reflection.
a) greater than
b) equal to
c) less than
d) None of the above
When you look in a convex mirror, the image appears
a) smaller than it really is.
b) larger than it really is.
c) lighter than it really is.
d) darker than it really is.
Which statement about a diverging
lens is correct?
It bends light inward and can
create either a virtual or a real
image.
b) It bends light inward and can
only create a real image.
c) It bends light outward and can
create either a virtual or a real
image.
d) It bends light outward and can
only create a virtual image.
a)
Light is composed of waves and particles called:
a) electrons
b) photons
c) quarks
d) waves
The visible spectrum of light from the longest to shortest
wavelength is:
a) violet, indigo, blue, green, yellow, orange, red
b) red, orange, yellow, green, blue, indigo, violet
c) infrared, ultraviolet, gamma, x-rays, microwaves
d) green, orange, red, violet
A magnifying glass is an example of a:
a) convex lens
b) prism
c) concave lens
d) convex mirror
Convex lenses converge light rays to a:
a) real image
b) focal point
c) focus
d) virtual image
An example of a diverging lens that spreads light rays is
the:
a) convex lens
b) converging lens
c) concave lens
d) prism
A survivor from a shipwreck
sees an image of a fish in the
water. To catch it with her
spear, she must
a)
b)
c)
d)
aim above the image of the fish
aim at the image of the fish
aim below the image of the fish
aim behind the fish
When the crests of one wave overlap the crests of
another wave or wave, this occurs
a) diffraction
b) constructive interference
c) destructive interference
d) resonant frequencies
An echo is the result of a
a) reflected sound wave
b) refracted sound wave
c) diffracted sound wave
d) dispersed sound wave
What happens to a wave when it is refracted?
a) It is bent
b) It is reflected
c) It is diffracted
d) It is radiated
a)
b)
c)
d)
e)
f)
g)
optics
convex
image
convergent
object
divergent
concave
____
31.
The study of how light behaves.
____
32.
A lens or mirror that is bigger in the middle.
____
33.
light rays that spread apart
____
34.
Where your eyes think something is.
____ 35.
Light ray that come together.
____
36.
What you are actually looking at.
____
37.
A lens or mirror that is bigger at the ends.
a)
b)
c)
d)
e)
f)
Normal
angle of reflection
Mirror
lens
angle of incidence
focus
____
38.
a line drawn perpendicular to the surface of a mirror or lens
____
39.
An optical device that works by refraction to bend light.
____ 40.
from the normal to the incoming ray.
____ 41.
from the normal to the outgoing ray
____ 42.
Where all parallel rays come together
____ 43.
an optical device that works by reflection
a)
b)
c)
d)
e)
photon
EM Spectrum
prism
energy level
light
____ 44.
An orbit of electrons. To move from low to high requires energy.
____
45.
all light: visible and invisible
____
46.
used to separate white light into its colors
____
47.
a single particle or packet of light
____
48.
a wave that can travel through a vacuum
Arrange the Electromagnetic Spectrum from low photon energy to high photon
energy
a)
Gamma Rays
b)
X-rays
c)
Infrared
d)
Ultraviolet
e)
Microwaves
f)
Visible Light
g)
Radio Waves
____
49.
Lowest Photon Energy
____
50.
______
____
51.
______
____
52.
______
____
53.
______
____
54.
______
____
55.
Highest Photon Energy
Convex and Concave Lens
Convex and Concave Mirrors
Primary Colors of Light
Total internal Refraction
Mirage- Optical Illusions
two opposing
parabolic mirrors
Fun with Refraction
and Reflection