Forensic 411 - Midterm I Actual Exam Questions With Correct Answers Rated A+
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Course
Forensic 411
Institution
Forensic 411
In more dense transparent materials, light travels... - CORRECT ANSWER-slower
A transparent material's n is... - CORRECT ANSWER-c/cm (always greater than 1)
Vibration of light for unpolarized light - CORRECT ANSWER-along numerous random directions perpendicular to the light's direction of tra...
Forensic 411 - Midterm I Actual Exam
Questions With Correct Answers Rated
A+
In more dense transparent materials, light travels... - CORRECT ANSWER-slower
A transparent material's n is... - CORRECT ANSWER-c/cm (always greater than 1)
Vibration of light for unpolarized light - CORRECT ANSWER-along numerous random
directions perpendicular to the light's direction of travel
Polarizer - CORRECT ANSWER-constraints the light to vibrate parallel to a single
direction
Privileged direction - CORRECT ANSWER-direction the polarizer constrains the light
Plane polarized - CORRECT ANSWER-light with vibration direction and direction of
travel lie in and define a plane
Isotropic - CORRECT ANSWER-materials through which monochromatic light travels
with the same velocity regardless of direction of vibration - angle between the ray's path
and its vibration direction always equals 90 degrees
Anisotropic - CORRECT ANSWER-materials through which monochromatic light travels
with different velocities for different directions of vibration (mainly the crystals of any non
isometric system)
The narrower the range of wavelength... - CORRECT ANSWER-the more highly
monochromatic the light is (sodium vapor lamp)
, Light energy is generally considered to travel by means of a... - CORRECT ANSWER-
transverse wave motion in which the vibration of the particles is usually perpendicular to
the direction of travel of the energy
After passing through the polarizer, the light... - CORRECT ANSWER-exclusively
vibrates parallel to PP', the privileged direction of the polarizer
Wavelength may be defined as... - CORRECT ANSWER-the distance between two
neighboring points at all times experience vibrations of the same amount and direction,
such points being said to be in phase
The amplitude of a wave is defined as - CORRECT ANSWER-the maximum vibrational
displacement observed
Relationship between frequency, wavelength and velocity - CORRECT ANSWER-c =
fwavelength
The frequency of a beam of monochromatic light... - CORRECT ANSWER-never
changes, even if the light enters an entirely different material. Wavelength and velocity
do change upon entrance into a different medium. Wavelength changes in the same
proportion as does its velocity.
Index of refraction = - CORRECT ANSWER-velocity of light in a vacuum (c) /velocity of
light in the material (cm)
Velocity in transparent materials = - CORRECT ANSWER-cm is less than c
Wavelength of light entering a new medium... - CORRECT ANSWER-changes inversely
proportionally to its RI in the new medium
When an incident ray strikes the contact plane between two isotropic materials, its
energy divides into... - CORRECT ANSWER-a reflected ray OL (perpendicular to the
plane of incidence) and a refracted ray OR (vibrations are principally within the plane of
incidence). All three rays lie in the plane of incidence.
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