waves (def.)
wave calculations
sound
light
metric conversion
100
A ____________ is a stationary wiggle
What is vibration
100
What is the frequency of a wave if it completes 1 cycle in 5 secs?
What is 1/5 Hz
100
sound is an example of a _______________ wave
What is longitudinal wave
100
Light is an example of this type of wave
What is transverse wave
100
Convert 35.4 km to Mm
What is 0.0354 Mm
200
A bird sitting on top of a pier counts four wave crests pass by. How many WAVELENGTHS pass by the bird?
What is three wavelengths
200
What is the period of a 0.4 Hz wave?
What is 2.5 sec
200
This part of the ear is responsible for sensing changes in air pressure.
What is the ear drum
200
All electromagnetic waves travel at this speed in km/s
What is 300,000 km/s
200
Convert 35.4 dm to nm
What is 3,540,000,000
300
Wave in which the medium moves up and down, while the wave moves left to right
What is transverse wave
300
One wave passes by a pier every 5 s. If the wavelength of the wave is 12 m, what is the wave speed?
What is 2.4 m/s? f = 1/5 Hz wavelength = 12 m v = ?? v = (12)(1/5) = 12/5 m/s
300
this occurs when forced vibration matches an object's natural frequency.
What is resonance
300
____________materials absorb light without re-emission.
What is opaque
300
Green light from a laser has a wavelength of 530 nm. What is the wavelength of green light in mm?
What is 0.00053 mm
400
All waves transmit this
What is energy
400
A sound wave has a speed of 340 m/s in air. If the wave has a frequency of 185 Hz, what is its wavelength?
What is 1.84 m? v = 340 m/s f = 185 Hz lamba = ?? v = (lamba)f 340 = (lamba)185 lamba = 1.84 m
400
This occurs when two waves overlap so that their crests and troughs line up perfectly.
What is constructive interference
400
These are filters for light. They only allow a certain direction of light to pass through.
What is polarizers
400
My favorite radio station operates at a frequency of 105.3 MHz. How many hertz is this?
What is 105,300,000 Hz (105.3 million hertz)
500
In a standing wave, the _________ is the area of zero disturbance while the ___________ is the area of maximal disturbance.
What is a) a node b)anti node
500
A sound wave travels at 345 m/s in air and has a wavelength of 1.9 m. What is the PERIOD of the wave?
What is 0.005s v = 345 m/s (lamba) = 1.9 m f = ?? v = (lamba)f 345 = (1.9)f f = 181.6 Hz Period = 1/f = 1/181.6 = 0.005 s
500
Pitch is dependent on _____________ loudness is dependent on _________
What is frequency, amplitude
500
Shadows are composed of these two things
What is umbra (total shadow, no light can reach) and penumbra (partial shadow, some light can reach)
500
Blue light has a wavelength of 435 nm. How many wavelengths of blue light will fit into a 100 micrometer wide hair?
What is about 230 wavelengths 435 nm = 0.435 micrometer To find the number of wavelengths in a distance, divide the distance by the wavelength 100 / 0.435 = 230 wavelengths
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