Refraction of light at plane surfaces — Formula Sheet
Telangana Board · Class 9 · Physical Science
3 formulas from Refraction of light at plane surfaces (Telangana Board Class 9 Physical Science) on one page, grouped by topic.
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Formulas and Key Relations
Refractive Index
Absolute refractive index
n = c/v, where c is speed of light in vacuum, v is speed in medium
Key relations
Absolute refractive index n = c/v.
Critical angle C is the angle of incidence (in denser medium) at which refracted ray grazes the interface (r = 90°).
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