MindMap Gallery Diffraction of light Polarization of light
Summary of polarization of diffracted light in university physics, including Fresnel principle, classification, half-wave band method, etc. Friends in need hurry up and collect it!
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This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
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Diffraction of light Polarization of light
diffraction of light
When a wave encounters an obstacle, it bypasses the obstacle and enters the geometric shadow area.
Huygens' principle
Every point on the wave surface is a wave source that emits a wavelet, and the envelope of the wavelet is the new wave front.
Fresnel principle
Each wavelet has the same initial phase
Wavelet phase at point P
The amplitude of the wavelet at point P
The vibration of any point P in space is the result of the coherent superposition of vibrations caused by all wavelets at that point.
Combined vibration:
Classification
Fresnel diffraction
Fraunhofer diffraction
Characteristics: Concentric circles of alternating light and dark circles
Central bright streak: Airy spots
Corner radius:
Airy disk radius:
half band method
Maximum optical path difference
Light and dark pattern conditions
Diffraction against double slits
stripe angle width
central clear pattern
f is the focal length
The rest of the clear pattern
Light intensity distribution
Fresnel band method
Central clear pattern center: all light rays interfere constructively
First-level clear pattern center: 1/3 light interference constructive
Move the position of the single seam up and down, and the position of the central plain pattern remains unchanged.
amplitude vector method
Optical instrument resolution ability
Rayleigh criterion:
Resolution:
diffraction grating
An optical element composed of a large number of parallel slits (or reflective surfaces) of equal width and equal spacing
a: Width of the translucent (or reflective) part
b: Width of the opaque (or non-reflective) part
Raster constant: d=a b
Grating diffraction fringe characteristics
Ming pattern (main Ming pattern, main maximum) thin and bright
Main clear grain angle width
The narrower and brighter the main fringes are, the higher the grating resolution is.
There is a gradation phenomenon
Single-slit diffraction affects multi-slit interference
diffraction pattern
grating equation
The optical path difference is
Clear pattern conditions:
Location:
superlative
phase difference
dark pattern conditions
Location
There are N-1 dark lines and N-2 light lines between two adjacent main light lines.
Missing grade phenomenon
The main level large clear pattern coincides with the single slit diffraction dark pattern
grating main clear pattern
Single seam dark pattern
diffraction spectrum
Clear patterns of different colors are arranged according to wavelength to present colored light bands - chromatography
White light incident
The main clear pattern is white light
The clear lines on both sides are arranged from purple to red
polarization of light
Polarization: The asymmetric distribution of the direction of wave vibration with respect to the direction of propagation
Light waves are transverse waves
transverse wave
Asymmetrical to the direction of propagation
Longitudinal wave
Symmetrical to the direction of propagation
Polarization direction: The direction of light vibration that is allowed to pass through
Marius theorem
natural light incident
linearly polarized light incident
Reflection and refraction polarization
Normally
satisfy
The reflection line is perpendicular to the refraction line
brewster point
Chapter 22