Exam (elaborations) GACE Science (024/025/524) 2025 Gace Science 024, 025,
524
Frequency, f - (answers)Number of cycles/ second; f = 1/period, T; Inverse of Period.
Period, T - (answers)# seconds/cycle - Time it takes to complete one cycle. Inverse of frequency.
Coulomb's Law - (answers)Force of charged particles is dependent on 2 factors: 1) distance
between charged particles; 2) amount of electric charge they carry.
Amplitude, A - (answers)Height of wave crest from midline (can be measured in meters)
Wavelength, lambda - (answers)Horizontal distance between cycles
Speed, v - (answers)Wavelength x frequency
眼睛”主题的中文文章？
What is the Wave Equation? - (answers)v=frequency(f) x lambda
What are sound waves? - (answers)Sound waves are longitudinal waves that travel by
compressions and rarefactions through a medium (must have a medium and may be a solid,
liquid or gas).
What phase of matter do sound waves travel the fastest and why? - (answers)Solids, because the
particles are more tightly packed together which allows the fastest transfer of the wave vibration
from particle to particle.
What affect does temperature have on sound waves? - (answers)Increasing the temperature
increasing the speed of the sound wave. v = 331 meters/sec x 0.61 (degrees C) .
,What type of medium do Electromagnetic Waves require for traveling? -
(answers)Electromagnetic waves can travel in any medium - even a vacuum.
What is the Wave Equation for Electromagnetic Waves? - (answers)Wavelength (lambda) =
Speed of Light (C)/Frequency (f).
What type of EM waves have the longest wavelengths?
A. Radio
B. Visible Light
C. Infrared Radiation
D. Gamma and X-Rays - (answers)A. Radio
How fast to electromagnetic waves travel? - (answers)3E8 meters/sec (300,000,000 meters/sec).
This is the speed of light!
What are the two components of an electromagnetic wave? - (answers)They have an electrical
component and a magnetic component (thus their name "electromagnetic").
眼睛”主题的中文文章？
Name the seven Electromagnetic Waves. - (answers)1. Visible Light
2. Infrared
3. Ultraviolet
4. Radio Waves
5. Microwaves
6. X-Rays
7. Gamma Rays
What type of wave has the shortest wavelength and the highest frequency? - (answers)Gamma
Rays
,For sound waves, which of the seven wave properties describe the wave energy? -
(answers)Amplitude.
For sound waves, the amount of energy that is carried over a certain area in a certain amount of
time is known as the _________________________ and is measured using the ____________
scale. - (answers)Intensity, decibels
Humans can hear sound that is between _______ and ______ Hertz. - (answers)20 and 20,000.
What type of wave do sound waves produce? - (answers)Longitudinal.
What is the frequency range for visible light on the Electromagnetic Spectrum? - (answers)760
nm to 380 nm
For EM waves, wavelength is ______________________ proportional to frequency. -
(answers)inversely
眼睛”主题的中文文章？
Electromagnetic waves originate from the vibration of ___________________________
__________________________________. - (answers)charged particles (atomic).
What is the incident ray? - (answers)A ray (straight line from source) that approaches a reflective
surface.
What is a reflected ray? - (answers)The ray that travels away from the reflected surface (initially
by the incident ray). Angles of the reflected ray match the incident ray's angle.
What is the law of reflection - (answers)Angle of incidence = angle of reflection (in respect to
"normal" which is the line perpendicular (90 degrees) to the reflective surface.). If the reflective
surface is curved, the law of reflection applies throughout a curved surface even as the direction
of the normal line varies.
, What is Specular Reflection? - (answers)When rays are reflected off of a smooth surface and
causes reflected rays to travel in the same direction.
What is Diffuse Reflection? - (answers)When a rough surface causes reflected rays to travel in
different directions.
What is Resonant Frequency? - (answers)Also called Natural Frequency and is the frequency at
which certain objects (particles, molecules or larger objects) tend to vibrate.
What is Resonance? - (answers)The amplitude of an object's oscillations are increased by the
matching vibrations of another object.
What is Transmission? - (answers)When the wave (light) frequency does not match the objects
resonance frequency so the light wave passes through. EM waves passing through an object
(without resonance absorption).
What is Opaque? - (answers)Materials that do not allow the transmission of light waves. These
materials reflect light waves off their surface.
眼睛”主题的中文文章？
What is color? - (answers)The appearance of color is due to the selective absorption of light
waves. Each color has it's unique frequency that is either absorbed, transmitted or reflected from
an objects surface. The color you see, is the frequency of light that is reflected. Color is the
perception of a visible light wave's frequency.
What is Refraction? - (answers)The change in direction of a wave when it passes from one
medium to another. This is not reflection. Refraction occurs when light is transmitted from one
medium to another (Air, Water, Glass).
What is the Index of Refraction? - (answers)A number that represents how a ray is refracted in a
different medium. Rays travel at different speeds in different mediums.
What is Snell's law? - (answers)
524
Frequency, f - (answers)Number of cycles/ second; f = 1/period, T; Inverse of Period.
Period, T - (answers)# seconds/cycle - Time it takes to complete one cycle. Inverse of frequency.
Coulomb's Law - (answers)Force of charged particles is dependent on 2 factors: 1) distance
between charged particles; 2) amount of electric charge they carry.
Amplitude, A - (answers)Height of wave crest from midline (can be measured in meters)
Wavelength, lambda - (answers)Horizontal distance between cycles
Speed, v - (answers)Wavelength x frequency
眼睛”主题的中文文章？
What is the Wave Equation? - (answers)v=frequency(f) x lambda
What are sound waves? - (answers)Sound waves are longitudinal waves that travel by
compressions and rarefactions through a medium (must have a medium and may be a solid,
liquid or gas).
What phase of matter do sound waves travel the fastest and why? - (answers)Solids, because the
particles are more tightly packed together which allows the fastest transfer of the wave vibration
from particle to particle.
What affect does temperature have on sound waves? - (answers)Increasing the temperature
increasing the speed of the sound wave. v = 331 meters/sec x 0.61 (degrees C) .
,What type of medium do Electromagnetic Waves require for traveling? -
(answers)Electromagnetic waves can travel in any medium - even a vacuum.
What is the Wave Equation for Electromagnetic Waves? - (answers)Wavelength (lambda) =
Speed of Light (C)/Frequency (f).
What type of EM waves have the longest wavelengths?
A. Radio
B. Visible Light
C. Infrared Radiation
D. Gamma and X-Rays - (answers)A. Radio
How fast to electromagnetic waves travel? - (answers)3E8 meters/sec (300,000,000 meters/sec).
This is the speed of light!
What are the two components of an electromagnetic wave? - (answers)They have an electrical
component and a magnetic component (thus their name "electromagnetic").
眼睛”主题的中文文章？
Name the seven Electromagnetic Waves. - (answers)1. Visible Light
2. Infrared
3. Ultraviolet
4. Radio Waves
5. Microwaves
6. X-Rays
7. Gamma Rays
What type of wave has the shortest wavelength and the highest frequency? - (answers)Gamma
Rays
,For sound waves, which of the seven wave properties describe the wave energy? -
(answers)Amplitude.
For sound waves, the amount of energy that is carried over a certain area in a certain amount of
time is known as the _________________________ and is measured using the ____________
scale. - (answers)Intensity, decibels
Humans can hear sound that is between _______ and ______ Hertz. - (answers)20 and 20,000.
What type of wave do sound waves produce? - (answers)Longitudinal.
What is the frequency range for visible light on the Electromagnetic Spectrum? - (answers)760
nm to 380 nm
For EM waves, wavelength is ______________________ proportional to frequency. -
(answers)inversely
眼睛”主题的中文文章？
Electromagnetic waves originate from the vibration of ___________________________
__________________________________. - (answers)charged particles (atomic).
What is the incident ray? - (answers)A ray (straight line from source) that approaches a reflective
surface.
What is a reflected ray? - (answers)The ray that travels away from the reflected surface (initially
by the incident ray). Angles of the reflected ray match the incident ray's angle.
What is the law of reflection - (answers)Angle of incidence = angle of reflection (in respect to
"normal" which is the line perpendicular (90 degrees) to the reflective surface.). If the reflective
surface is curved, the law of reflection applies throughout a curved surface even as the direction
of the normal line varies.
, What is Specular Reflection? - (answers)When rays are reflected off of a smooth surface and
causes reflected rays to travel in the same direction.
What is Diffuse Reflection? - (answers)When a rough surface causes reflected rays to travel in
different directions.
What is Resonant Frequency? - (answers)Also called Natural Frequency and is the frequency at
which certain objects (particles, molecules or larger objects) tend to vibrate.
What is Resonance? - (answers)The amplitude of an object's oscillations are increased by the
matching vibrations of another object.
What is Transmission? - (answers)When the wave (light) frequency does not match the objects
resonance frequency so the light wave passes through. EM waves passing through an object
(without resonance absorption).
What is Opaque? - (answers)Materials that do not allow the transmission of light waves. These
materials reflect light waves off their surface.
眼睛”主题的中文文章？
What is color? - (answers)The appearance of color is due to the selective absorption of light
waves. Each color has it's unique frequency that is either absorbed, transmitted or reflected from
an objects surface. The color you see, is the frequency of light that is reflected. Color is the
perception of a visible light wave's frequency.
What is Refraction? - (answers)The change in direction of a wave when it passes from one
medium to another. This is not reflection. Refraction occurs when light is transmitted from one
medium to another (Air, Water, Glass).
What is the Index of Refraction? - (answers)A number that represents how a ray is refracted in a
different medium. Rays travel at different speeds in different mediums.
What is Snell's law? - (answers)
