Question 1 (1 point)
An interference that produces a dimmer light or dark spots is

a
diffraction
b
incoherent
c
stimulated emission
d
constructive interference
e
destructive interference
f
laser
Question 2 (1 point)
The difference in the distance traveled by two waves or by two interfering lights

a
constructive interference
b
order number
c
Path difference
d
incoherent
e
resolving power
f
diffraction grating
Question 3 (1 point)
The substance use in lasers to which energy is added to produce coherent light

a
dichromatic
b
liquid medium
c
zeroth order maximum
d
diffraction grating
e
order number
f
active medium
Question 4 (1 point)
If the crest of one wave overlaps the trough of the other wave the two waves have a phase difference of 180o.

a
Huygen's principle
b
out of phase
c
order number
d
in phase
e
coherence
f
emission
Question 5 (1 point)
The property by which two waves with identical wavelengths maintain a constant phase relationship is-

a
reflection
b
interference
c
in phase
d
incoherence
e
diffraction
f
coherence
Question 6 (1 point)
Lightwaves that have the same wavelength is

a
monochromatic
b
order number
c
laser
d
ultraviolet
e
polychromatic
f
infrared
Question 7 (1 point)
A device that produces an intense, nearly parallel beam of coherent light

a
order number
b
active medium
c
laser
d
in phase
e
diffraction grating
f
monochromatic
Question 8 (1 point)
The spreading of waves into a region behind an obstruction is-

a
reflection
b
refraction
c
interference
d
diffraction
e
coherence
f
path difference
Question 9 (1 point)
The ability of an optical instrument to separate two images that are close together-

a
Diffraction
b
order number
c
resolving power
d
interference
e
emission
f
laser
Question 10 (1 point)
When the light of a certain wavelength is applied to excited atoms, they can release light waves that have the same properties

a
out of phase
b
diffraction
c
refraction
d
interference
e
stimulated emission
f
interference