Which type of wave on the Electromagnetic Spectrum has the longest wavelenght?
Radio waves (also microwaves)
100
A wave can pass through cracks or bend around objects. What is this called?
What is DIFFRACTION
100
Describe how to create a LONGITUDINAL WAVE using a slinky
"push" or "flick" the slinky. wave travels in the same direction left to right.
200
The lowest part of a transverse wave
What is the TROUGH
200
Name the unit that is used for FREQUENCY
What is HERTZ (Hz)
200
Which type of wave on the Electromagnetic Spectrum has the greatest frequency?
Gamma rays (also X-rays)
200
Describe ABSORPTION
Absorption happens when something blocks a wave and then the wave disappears
200
Describe one way that we made a PERPENDICULAR wave during a lab activity.
Slinky = moving up and down
Water Waves = travel perpendicular in the pan of water
Light Waves = all light waves are perpendicular
300
Explain AMPLITUDE
Amplitude is the distance from the middle of a wave to the crest or to the trough
300
Show all work to receive credit.
What is the speed of a wave if the frequency of the wave is 12 Hz and the wavelength is 4 meters.
v = frequency x wavelength
v = 12 Hz x 4 m
v = 48 meters/seconds
300
What type of waves on the Electromagnetic Spectrum is the only light that we can see?
Visible Light
300
Define REFLECTION
Reflection happens when a wave hits a surface and bounces off in the opposite direction
300
What did we do during the LIGHT lab to create REFRACTION?
We shined the laser light throguh the prism. The light traveled through the prism, but then changed shape on the other side.
400
Define FREQUENCY
FREQUENCY is how often a wave happens. It is the number of waves that pass by a point in one second.
400
Show all work to receive credit.
What is the wavelength of a wave that has a speed of 50 meters/second and a frequency of 8 Hz?
wavelength = velocity / frequency
wavelength = 50 meters per second / 8 Hz
wavelength = 6.25 meters
400
Describe what happens to the frequncy of a wave as it moves from left to right on the Electromagnetic Spectrum?
Frequency increases
400
Describe REFRACTION
Refraction happens when a wave hits and object, passes through, and changes shape.
400
Describe 2 ways that REFLECTION was done in lab activities.
Reflection was done in the water waves lab (pushing waves against the side of the pan)
Reflection was done in the light lab (using the mirror, the light was shined on the paper behind the light)
500
Explain WAVELENGTH and how you can count the number of wavelengths in a TRANSVERSE wave
Wavelength is the length of one complete wave shape. This could be from a trough to the next trough, crest to the next crest, etc.
500
Show all work to receive credit.
What is the frequency of a wave that has a speed of 100 meters/second and a wavelength of 12 meters?
Frequency = velocity / wavelength
Frequency = 100 meters/sec / 12 meters
Frequency = 8.33 Hz
500
Explain what happens to wavelength of a wave as it moves from left to right on the Electromagnetic Spectrum?
Wavelength decreases
500
Describe what happens when a wave passes through a small crack.
This is DIFFRACTION. A wave (sound wave, light wave, water wave) can pass through a crack, but then changes shape into a semi-circle.
500
How could you increase AMPLITUDE in a slinky?
Remember, amplitude is the measure from the middle line up to the crest or down to the trough. To increase amplitude, you can provide more force.