Because the optical paths of the lenses are equal, there will be no extra optical path difference and half-wave loss when using the lenses, and half-wave loss will occur when the incident light is grazing incident (the incident angle is about 90) or vertical incident (the incident angle is about 0) from sparse (n 1 small) to the optical dense medium interface (n2 is large). Optical density → sparse light without half-wave loss. Refraction without half-wave loss.
Stripe characteristic monochromatic light irradiation: a series of parallel bright and dark stripes; When θ is not too large, the stripes are equally spaced and the middle order is low; Δ x ∝ λ. White light irradiation: the zero-order bright stripe is white, and other bright stripes form a color band, from purple to red, and the second level begins to overlap.
The law of refraction was discovered by the Dutch mathematician Snitch, which is the law to determine the direction of refracted light in the phenomenon of light refraction. When light enters from a medium with high speed of light into a medium with low speed of light, the refraction angle is smaller than the incident angle; The refraction angle is greater than the incident angle when entering the medium with high light speed from the medium with low light speed.
C=3× 108km/s, en = e1+12.6 =-1ev, x=kDλ/d, etc.