Waves/Light/Law Of Reflection/Refraction Flashcards
Period - symbol, unit and defintion
T
S (seconds)
Time it takes for one cycle (wave)
Frequency
Symbol
Unit
Defintion
f
Hz
How many waves in one second
Wave length
Symbol
Unit
Defintion
ג
m (meters)
Has to start wherever it ended
Length of one wave
Antinode
Crest
Trothe
Node
1) farthest from midline
2) peak - highest
3) low peak
4) on midline - no displacement
Amplitude
Has to do with sound
The higer it is the louder it is
Frequency represents
Meaning
The higher the frequency (faster)
The lesser the frequency
1) pitch
2) how high the vouce is
3) higher the pitch
4) lower the pitch = deep
How to find the seconds in one wave
The whole time / the wave length
How to find the wave length
Length of the whole wave / number of waves
What does air do? What does the affect?
Compresses and elongates
Affects the travel of sound
If you shine light at a _____
It will ____
What is this called?
Certain angle
It will bounce back at the same angle
Reflection
What do we draw when dealing with law of reflection or refraction
Normal line
The thicker the material ….
The more the light will bend
What does the faster do?
Follow the slower
What is the slower part? What will this make the light do?
In the thicker material
It will bend sharper - bend more
N =
Meaning what
Index of refraction
How fast light will move and bend by
Diffraction
When a wave encounters an obstacle it Bending - squeezing through or around
Refraction for what
Just for light
Interference
What are the two types - definition
1) two or more waves collide
Constructive - 2 or more waves enhance each other
Ex: crest + crest = bigger crest
Destructive - waves that will cancel each other out
Crest + troth = will not do anything
What is the refracted angle from glass to air
90
Total internal reflection
When the angle of refraction is 90° or greater that the total light is reflected back into the original material and no light enters the new material
Critical angle
The maximum refracted angle possible that light would skim the surface boundary Btwn the two media
If exceeded light would no longer escape and be reflected back into the medium
Mechanical waves
Ex
A wave that needs a material to carry on the wave
Water wave, rope, human wave
Electromagnetic wave
Ex
No medium
Radio, uv, gamma ray, X-ray
Transverse wave
Ex
The wave moves up and down but the energy moves perpendicular to the material
Vibration in a guitar string, S waves, surface waves
Longitudinal/compressional waves
Ex
Waves that energy and material move in the same way
Sound slinky pwave
Two types of mechanical waves
Tran severe and longitudinal
