Kuna wakati macho na masikio huwa yanatudanganya

Kuna wakati macho na masikio huwa yanatudanganya

Refractive index (n) of a material is defined as a ratio of the sine of angle of incidence (i) of a beam of light to the sine of angle of refraction (r) of the same beam of light; travelling within that material or medium
i.e, n=sini/sinr
 
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