Characteristics of Waves
What is a wave?
Disturbance that transfers energy from place to place
What type of wave is sound? (direction of initial motion compared to direction of propagation of motion)
Longitudinal waves (not transverse)
What is the speed of all Electromagnetic Waves in a vacuum?
speed of light: 3.00*10^8 m/s (300,000 km/s)
Structures used to identify colors and brightness, respectively
Cones and Rods
True/False: Waves travel through the medium and end up moving the medium along with the wave
False, it only passes through the medium
True/False - the speed of sound is inversely proportional to the density of the medium
True
tool that only allows a certain orientation of waves to pass through it
Polarizing Filter
True/False - concave lenses' focal point is beyond the lense
True
Name 4 of the main characteristics of Waves
Period/Amplitude/Frequency/Wavelength
What is resonance and describe an example that you can think of? (can use personal experience or example given in class)
resonance is when the frequency of sound matches the frequency of an object or medium, creates constructive interference
example: Tacoma bridge that collapsed
Lowest frequency Electromagnetic Wave on the chart
Radio waves
True/False: prisms bend long wavelength light MORE then small wavelength light
False
Hertz is the unit for this characteristic
Frequency
The three parts of the ear are:
Outer/middle/inner ear
What is white light?
White light is a mixture of the entire visible light spectrum
3 primary colors
Red Blue Green
Name the two types of interference and what happens to the wave?
Constructive- combination of waves to cause higher amplitude compared to original waves (in phase)
Destructive - combination of waves results in lower amplitudes compared to original waves
Structure of our ear that provides balance due to fluid shifting/rotating in 3 different planes (x/y/z)
Semicircular canals
Phenomenon that occurs when a metal surface is struck by photons and ejects light
photoelectric effect - photoelectric cells
What is the difference between refraction and reflection?
reflection - light bounces off of the object (mirro)
refraction - light bending or changing direction when entering new medium