All Flashcards
What is the effect of decreasing the slit width in single-slit diffraction?
The central bright fringe becomes wider.
What is the effect of increasing the wavelength of light in single-slit diffraction?
The diffraction pattern spreads out, and the fringes are more widely spaced.
What happens when wavefronts are in phase after diffracting?
Constructive interference occurs, resulting in a bright region.
What happens when wavefronts are out of phase after diffracting?
Destructive interference occurs, resulting in a dark region.
What is the effect of using a diffraction grating instead of a single slit?
Sharper and more distinct bright spots are produced.
What is diffraction?
Diffraction is the bending of waves around obstacles or through openings.
Define constructive interference.
Constructive interference occurs when waves are in phase, resulting in increased amplitude (e.g., bright regions).
Define destructive interference.
Destructive interference occurs when waves are out of phase, resulting in decreased amplitude (e.g., dark regions).
What is monochromatic light?
Monochromatic light is light of a single wavelength or frequency.
Define 'wavelength'.
Wavelength is the distance between two successive crests or troughs of a wave.
What are the differences between constructive and destructive interference?
Constructive Interference: Wavefronts are in phase, resulting in brighter regions. | Destructive Interference: Wavefronts are out of phase, resulting in darker regions.
Compare diffraction through a small opening vs. a large opening (relative to wavelength).
Small opening: More pronounced diffraction effects. | Large opening: Less noticeable diffraction.
Compare the diffraction patterns produced by single slits vs. double slits.
Single slits: Produce a pattern of bright and dark bands. | Double slits: Lead to evenly spaced bright fringes with varying intensities.
Compare the diffraction patterns produced by rectangular slits vs. circular openings.
Rectangular slits: Produce a pattern of bright spots separated by dark regions. | Circular openings: Create concentric rings of bright and dark fringes.
Compare diffraction gratings vs. double slits.
Double slits: Lead to evenly spaced bright fringes with varying intensities. | Diffraction gratings: Create sharper and more distinct bright spots.