Essential Question What is a wavepg 43 Disturbance in matter than transfers energy from one place to another What is the medium of a wave created by people at a sporting event People holding hands ID: 564001
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Slide1
Transverse Waves and LightsSlide2
Essential Question: What is a wave?(pg. 43)
Disturbance in matter than transfers energy from one place to another. Slide3
What is the medium of a wave created by people at a sporting event?
People holding handsSlide4
What is a medium?
The matter that the energy of mechanical wave travels through
.Slide5
Essential Question: What is a transverse wave? (pg.
45)
Wave in which the particles of the medium move/vibrate at right angles, or perpendicular to the direction that the wave travels. Slide6
What is the lowest part of a transverse wave called?
The troughSlide7
What part of the wave represents the energy in the wave?
The amplitude ( large amplitude; more energy)
Wavelength (shorter wavelength; higher energy
Frequency ( high frequency; high energy)Slide8
Your Question: How do particles of
the medium of
a transverse wave vibrate?
They vibrate perpendicular to the direction the wave travels. Slide9
Essential Question: What is the relationship between energy and the frequency/speed of the wave?
(pg. 49)
As energy increases, the frequency and speed of the wave also increase.Slide10
What is frequency
and what is the S.I. Unit for frequency?
The number of waves that pass a fixed point in a given amount of time. (measured in Hertz, Hz)
Hertz (Hz)Slide11
How does frequency affect wavelength?
Higher frequency means shorter wavelength.
Lower frequency means longer wavelength.Slide12
Two waves have the same amplitude but different wavelength. Which one has more frequency?
The wave with the shorter wavelength has more frequency. Slide13
What factors affect the speed of the wave?
Wavelength and Frequency
The medium and the temperature also
Affect the speed of a wave.Slide14
Your question: How are frequency, amplitude and wavelength related to energy of a transverse wave?
Higher frequency means more energy
Higher amplitude means more energy
Smaller/shorter wavelength mean more energySlide15
What factors affect the speed of waves? (pg. 51)
Frequency, wavelength, temperature, and type of mediumSlide16
When would a sound wave move fastest? The summer or the winter?
It would move faster in the summer, because the particles move faster due to the high temperature. Slide17
Essential Question: What happens when a wave strikes a new medium? (pg. 55)
When a wave strikes a new medium it can either:
Reflect: bounce back if it can’t pass through the medium.
Refract: bend, because it travels at different speed through different medium. Slide18
What is the law of reflection?
Angle of incidence equals to angle of reflection.Slide19
What causes refraction to occur?
It occurs when waves enter through a medium at an angle. Waves bend as they travel through a medium, because they start travelling at a different speed in a new medium.Slide20
Light wave hits the surface of the mirror at a 30 degree angle. Draw the angle of reflection and the angle of incidence. Slide21
Essential Question: What is wave interference? (pg. 57)
Wave interference is when waves interact with each other. Slide22
What is diffraction? What is reflection?
Diffraction: When waves spread out, travel around obstacles, or pass through an opening.
Reflection: when a wave hits a medium that it cannot pass through and therefore bounces back. Slide23
What happens if two waves run into each other and their crests overlap?
They will create constructive interference (they will create a
larger amplitude)Slide24
Your Question: What is destructive interference?
Occurs when the crest of one wave overlaps the trough of the other wave. They cancel each other out or create a wave with lower amplitude. Slide25
Essential Question: What is a light wave? (pg. 59)
Light wave is an electromagnetic wave.Slide26
What creates an electromagnetic wave?
Charged particle vibrates
causes the vibration of electric field creates a vibrating magnetic field two types of vibrating fields combine to form electromagnetic wave. Slide27
What is different about electromagnetic wave and a regular mechanical transverse wave?
Electromagnetic wave can travel through empty space, but mechanical wave can only travel though a medium.Slide28
Your Question: What is electromagnetic radiation?
It is the energy transferred by electromagnetic waves. Slide29
Essential Question: Is light a wave or particle? (pg. 61)
Light can behave as both a wave and a particle. (it resembles a particle but moves like a wave)Slide30
What is a photon?
A photon is packets of energy and tiny particles of lightSlide31
How fast is light?
Light travels at the speed of 3 * 10^8 m/s.Slide32
What are the three types of matter? Explain the difference between them.
Transparent: Easily transmit light (allows most light to pass though).
Ie
. glass
Translucent: It transmits and scatters light at the same time (allows some light to pass through).
Ie
. Frosted window
Opaque: It does not transmit light (no light can pass through).
Ie
. Aluminum foilSlide33Slide34
Your Question: What are the three things that could happen when light strikes a matter?
Reflection, absorption, or transmissionSlide35
Essential Question (pg. 67): What is a mirror?
Object made of glass that reflects all the light that strikes it. Slide36
What type of image do you get from a plane mirror?
Virtual and reversed imageSlide37
Your Question: What is the difference between a convex lens and concave lens?
Convex lens: is thicker in the middle and thinner at the edges (form an image that is larger than the real object)
Concave lens: thinner in the middle and thicker and the edges (forms an image that is smaller than the real object. Slide38
A disturbance in matter that transfers energy from on place to another
Mechanical WaveSlide39
The matter that mechanical energy travels through
MediumSlide40
Particles of the matter move perpendicular to the direction the wave travels
Transverse WaveSlide41
The high points of the wave
CrestsSlide42
The low points of the wave
TroughSlide43
Maximum distance the particles of the medium move from their resting position when a wave passes through.
Amplitude Slide44
Where the particles of the medium are in the absence of wave
Resting positionSlide45
The distance between two corresponding points on adjacent waves
Wavelength
Slide46