All Flashcards
Label the double-slit interference diagram: (1) Slits, (2) Screen, (3) Central Maximum, (4) First Order Maximum.
1: Slits, 2: Screen, 3: Central Maximum (m=0), 4: First Order Maximum (m=1)
Label the diffraction grating spectrum: (1) Central Maximum, (2) Red Light, (3) Violet Light.
1: Central Maximum (white), 2: Red Light (farthest from center), 3: Violet Light (closest to center)
What is the effect of increasing the slit separation (d) in double-slit interference?
The fringe spacing decreases.
What is the effect of increasing the wavelength () of light in double-slit interference?
The fringe spacing increases.
What happens when white light is used instead of monochromatic light in double-slit experiment?
The central fringe is white, but the other fringes are dispersed into a spectrum of colors.
What is the effect of increasing the number of slits in a diffraction grating?
The bright fringes become sharper and more intense.
What happens if the path length difference is an integer multiple of the wavelength?
Constructive interference occurs, resulting in a bright fringe.
What happens if the path length difference is a half-integer multiple of the wavelength?
Destructive interference occurs, resulting in a dark fringe.
Compare and contrast double-slit interference and single-slit diffraction.
Double-slit: Two coherent sources, creates evenly spaced fringes. Single-slit: One slit, creates a central maximum wider than other fringes, with decreasing intensity.
What are the key differences between interference patterns produced by double slits and diffraction gratings?
Double slits: Fewer, broader fringes. Diffraction gratings: Sharper, more distinct fringes, higher resolution.