Mind the Gap
Doppler
Going my Wave
Duality
EMR
100
What is the spreading out of a wave as it passes through an opening (the bending of waves around barriers)?
Diffraction
100
The Doppler effect is the perceived change in __________ of a wave due to the relative motion of a wave source or observer.
frequency
100
When two waves meet, they will do these 2 things.
Combine amplitudes and pass through each other (occupy the same space at the same time)
100
Light delivers energy in small packets, not continuously. This is evidence that light behaves like a...
particle
100
What is energy transmitted through waves that travel outward in all directions from a source.
Radiation
200
Francesco Grimaldi first documented diffraction when he noticed the edges of shadows are...
Not sharp but fuzzy
200
If both the wave source and observer are stationary relative to one another, what change in frequency will be observed?
No change
200
When the crest of two waves meet, this type of interference occurs.
Constructive interference?
200
Albert Einstein described light as small packets of energy. A packet of light energy is known as...
a photon
200
What are the two components of an electromagnetic wave?
Oscillations in electric and magnetic fields
300
What is the relationship between the width of the opening and the amount of diffraction of a wave?
Negative/inverse
300
If a sound source (550 Hz) is moving toward an observer, which of the following frequencies could the observer hear?
600 Hz
550 Hz
500 Hz
600 Hz (higher frequeny)
300
Destructive interference occurs when two waves are aligned in this way.
Crest-to-trough
300
When NO detectors are used, single photons will pass through 2 slits and...
Interfere
300
This electromagnetic wave is longest in wavelength and is used in broad range of communication devices.
Radio
400
What is the relationship between wavelength and amount of diffraction?
Positive/inverse
400
If an astronomer reports galaxy M87 is redshifted, what can you infer about galaxy M87?
M87 and Earth are moving away from each other.
400
What property of waves is the basis for active noise cancellation (noise cancelling headphones).
Destructive interference
400
When detectors ARE used, single photons will encounter a double slit and...
Pass through one slit or the other and not interfere
400
This electromagnetic wave has a lower frequency than red light and is emitted by animals because of their warm temperature.
Infrared
500
Why does white light split into different colors when passed through the small opening between pencil erasers?
White light is made of all the colors of the visible spectrum, each with a different wavelength. Different wavelengths diffract differently. This causes white light to be split into its component wavelengths (colors).
500
A distant galaxy is moving away from us at a fast rate. One of the spectral lines, which when measured on Earth has a wavelength of 434 nm, has been shifted due to the galaxy's motion. What could the wavelength of this spectral line be?
376 nm
434 nm
480 nm
480 nm - the galaxy is moving away from us which means the perceived frequency will be lower and the wavelength will be longer.
500
When observing light interference a series of alternating bright and dark bands appear. What causes the bright bands and what causes the dark bands?
Bright bands - constructive interference
Dark bands - destructive interference
500
What is the significance of this picture?
The first time scientists captured an image of light behaving as both a particle and a wave at the same time.
500
These three electromagnetic waves have wavelengths shorter than violet and are linked to cell damage, DNA mutations, and cancer.
UV, X-rays, Gamma