Interference is when two waves of the same type occupy the same space.
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What is Coherence?
Coherence is when two overlapping waves have the same frequency and a constant phase difference.
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Define Constructive Interference.
Constructive Interference is when two waves meet, if their displacements are in the same direction, they combine to give a bigger displacement.
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Define Destructive Interference.
Destructive Interference is when a wave with a positive displacement meets a wave with a negative displacement and they cancel each other out.
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How is a Bright Fringe Formed in Interference Fringes?
A bright fringe is formed in interference fringes when the light from one slit reinforces the light from the other slit. At a bright fringe the light from both slits will be in the same phase.
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How is a Dark Fringe Formed in Interference Fringes?
A dark fringe is formed due to cancellation, where the light from the slits are 180 degrees out of phase.
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What Light Does a Laser Contain?
A laser contains monochromatic and coherent light.
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Why Should you Never Look Directly into a Laser Beam?
You should never look directly into a laser beam because laser light is very concentrated and can destroy retina cells in the eye.
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Explain Young's Double-Slit Experiment.
Young's double-slit experiment consisted of the use of two coherent light sources or a laser which would be shone through two slits. The slits have to be the same size as the wavelength of the light so diffraction can take place.
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Other cards in this set
Card 2
Front
What is Coherence?
Back
Coherence is when two overlapping waves have the same frequency and a constant phase difference.
Card 3
Front
Define Constructive Interference.
Back
Card 4
Front
Define Destructive Interference.
Back
Card 5
Front
How is a Bright Fringe Formed in Interference Fringes?
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