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Review Of Speed Of Light In Air Vs Vacuum 2023. Web question select the correct alternative: 300 000 000 m/s is often written.
%3D %5Cfrac32%5C %5C %5C and%5C %5C %5C (%5Ceta _w)%3D%5Cfrac43%5C%5C %5Ctext{ Speed of light in glass %3D}2%5Ctimes10^8 m/s%5C%5C%5C%5C%5C%5C %5Ctext{Refractive index of glass}(%5Ceta _g)%3D%5Cfrac{%5Ctext{Speed of the light in vacuum}}{%5Ctext{Speed of the light in glass}}%5C%5C%5C%5C%5C%5C %5CRightarrow %5Cfrac32%3D%5Cfrac{%5Ctext{Speed of the light in vacuum}}{2%5Ctimes10^8}%5C%5C%5C%5C%5C%5C %5Ctherefore %5Ctext{Speed of the light in vacuum}%3D%5Cfrac32%5Ctimes2%5Ctimes10^8%3D3%5Ctimes10^8%5C%5C%5C%5C Now%2C%5C%5C%5C%5C %5Ctext{Refractive index of water}(%5Ceta _w)%3D%5Cfrac{%5Ctext{Speed of the light in vacuum}}{%5Ctext{Speed of the light in water}}%5C%5C%5C%5C %5CRightarrow %5Cfrac43%3D%5Cfrac{3%5Ctimes10^8}{%5Ctext{Speed of the light in water}}%5C%5C%5C%5C%5C%5C %5Ctherefore %5Ctext{Speed of the light in water}%3D%5Cfrac34%5Ctimes3%5Ctimes10^8%3D2.25%5Ctimes10^8%5C%5C%5C%5C Note:%5Ctext{Refractive indices of glass and water were interchanged due to incorrect value in the question})
N = c v, (25.3.3) (25.3.3) n = c v, where v v is the observed speed of light in the material. 671 million miles per hour). Web light in air is 1.0003 times slower than light in a vacuum, which slows it all the way down from 299,792,458 meters per second to 299,702,547 meters per second.
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