Wave Measures
Wave Behavior
Sound Waves
Light and Color
Electromagnetic Spectrum
100
How is wavelength defined for a transverse wave?
distance from one crest (or trough) to the next crest (or trough).
100
What term is used to describe the spreading out of a wave after it passes through a narrow opening?
Diffraction
100
TRUE or FALSE Sound does NOT need a medium to travel
FALSE
100
What are photons?
Tiny bundles or “packets” of energy that travel as an e/m wave.
- The “particles” of light
100
Fill in the Blank: Wavelength and frequency of electromagnetic waves are ___________________ (directly or inversely) proportional
inversely
200
What is the SI unit of frequency? What does it stand for (mean)?
Hertz (Hz)= per second
200
What is the difference between reflection and refraction?
Reflection: change in the course of a wave as a result of a collision with an object or boundary.
Refraction: bending of the path of a wave as a result of a change in wave speed.
200
What type of wave is sound?
Longitudinal
200
What color is perceived from the mixture of all the colors of light?
White
200
Which of the following categories of electromagnetic waves have the largest wavelength?
Blue light, Gamma Rays, Microwaves, or Ultraviolet Rays
Microwaves
300
Label the crest, trough, wavelength, and amplitude on this diagram
300
What size opening results in diffraction causing the wave to spread out most evenly?
When the openning is ~1 wavelength
300
What term is used to describe the effect of sound intensity on the way our ear perceives sound?
Loudness
300
Fill in the Blank: The Quantum theory of light says that light behaves like a _________ when traveling through space and behaves like a ______________ when interacting with matter
Wave, Particle
300
What type of electromagnetic radiation stimulates our bodies to produce Vitamin D?
Ultraviolet Radiation
400
A wave has a frequency of 50. Hz and a wavelength of 12. cm. What is the speed of the wave?
speed= wavelength x frequency
v= (50 Hz)(12 cm)= 600cm/s
400
A wave of incidence hits a solid barrier at a 43 degree angle and is reflected off. What is the angle of reflection?
43 degrees
400
What term describes the way sound wave frequency is perceived by the ear?
Pitch
400
Name the three subtractive primary colors of pigment.
Magenta, cyan, yellow
400
What 4 factors describe an electromagnetic wave?
1. Self-propagating
2. Dual transverse wave
3. Consisting of an electric field & a magnetic field
4. Vibrating at right angles to each other.
500
Label the rarefaction and compression pulse on this diagram:
500
The diagram shows two waves approaching each other.
a) Draw what the waves will look like when they meet (line up).
b) Draw what the waves will look like when they have fully passed each other.
c) What type of interference is exhibited above?
Destructing Interference
500
What measure of a wave is sound intensity related to?
Amplitude
500
What scientist is credited with proposing that light was an electromagnetic wave?
James Clerk Maxwell
500
Arrange the following categories of electromagnetic waves from lowest energy to highest:
Ultraviolet rays, Gamma Rays, Radio waves, Green light
1) Radio waves
2) Green light
3) Ultraviolet Rays
4) Gamma Rays