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1.2: The Propagation of Light
https://phys.libretexts.org/Courses/Bowdoin_College/Phys1140%3A_Introductory_Physics_II%3A_Part_2/01%3A_The_Nature_of_Light/1.02%3A_The_Propagation_of_Light
The index of refraction of a material is $n = \frac{c}{v}$ , where v is the speed of light in a material and c is the speed of light in a vacuum. The ray model of light describes the path of light as...The index of refraction of a material is $n = \frac{c}{v}$ , where v is the speed of light in a material and c is the speed of light in a vacuum. The ray model of light describes the path of light as straight lines. The part of optics dealing with the ray aspect of light is called geometric optics. Light can travel in three ways from a source to another location: (1) directly from the source through empty space; (2) through various media; and (3) after being reflected from a mirror.
10.2: The Propagation of Light
https://phys.libretexts.org/Courses/Muhlenberg_College/Physics_122%3A_General_Physics_II_(Collett)/10%3A_The_Nature_of_Light/10.02%3A_The_Propagation_of_Light
The index of refraction of a material is $n = \frac{c}{v}$ , where v is the speed of light in a material and c is the speed of light in a vacuum. The ray model of light describes the path of light as...The index of refraction of a material is $n = \frac{c}{v}$ , where v is the speed of light in a material and c is the speed of light in a vacuum. The ray model of light describes the path of light as straight lines. The part of optics dealing with the ray aspect of light is called geometric optics. Light can travel in three ways from a source to another location: (1) directly from the source through empty space; (2) through various media; and (3) after being reflected from a mirror.
10.1: The Propagation of Light
https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Physics_II_(2212)/10%3A_Geometrical_Optics/10.01%3A_The_Propagation_of_Light
Knowing the rotational speed of the wheel, the number of teeth on the wheel, and the distance to the mirror, Fizeau determined the speed of light to be $3.15 \times 10^8\,m/s$ , which is only 5% too ...Knowing the rotational speed of the wheel, the number of teeth on the wheel, and the distance to the mirror, Fizeau determined the speed of light to be $3.15 \times 10^8\,m/s$ , which is only 5% too high. The teeth of the wheel block the reflected light upon return when the wheel is rotated at a rate that matches the light travel time to and from the mirror.
11.4: The Propagation of Light
https://phys.libretexts.org/Courses/Grand_Rapids_Community_College/PH246_Calculus_Physics_II_(2025)/11%3A_Electromagnetic_Waves/11.04%3A_The_Propagation_of_Light
The index of refraction of a material is $n = \frac{c}{v}$ , where v is the speed of light in a material and c is the speed of light in a vacuum. The ray model of light describes the path of light as...The index of refraction of a material is $n = \frac{c}{v}$ , where v is the speed of light in a material and c is the speed of light in a vacuum. The ray model of light describes the path of light as straight lines. The part of optics dealing with the ray aspect of light is called geometric optics. Light can travel in three ways from a source to another location: (1) directly from the source through empty space; (2) through various media; and (3) after being reflected from a mirror.
10.3: The Propagation of Light
https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Introductory_Physics_II_(1112)/10%3A_Geometrical_Optics/10.03%3A_The_Propagation_of_Light
Knowing the rotational speed of the wheel, the number of teeth on the wheel, and the distance to the mirror, Fizeau determined the speed of light to be $3.15 \times 10^8\,m/s$ , which is only 5% too ...Knowing the rotational speed of the wheel, the number of teeth on the wheel, and the distance to the mirror, Fizeau determined the speed of light to be $3.15 \times 10^8\,m/s$ , which is only 5% too high. The teeth of the wheel block the reflected light upon return when the wheel is rotated at a rate that matches the light travel time to and from the mirror.
13.2: Ray and Wave Models of Propagation
https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/13%3A_Propagation_of_Electromagnetic_Waves/13.02%3A_Ray_and_Wave_Models_of_Propagation
The ray model of electromagnetic waves describes the path of the waves as straight lines. The rays can travel in three ways from a source to another location: (1) directly from the source through empt...The ray model of electromagnetic waves describes the path of the waves as straight lines. The rays can travel in three ways from a source to another location: (1) directly from the source through empty space; (2) through various media; and (3) after being reflected from a mirror.

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