<prompt> Ke tlasa maemo afe moo lebelo la khanya le lulang le sa fetohe?nan  <response>: Instruction in English: Under what conditions does the speed of light remain constant? . Response in English: The speed of light, commonly denoted as c, is always constant in a vacuum, regardless of the motion of the source or observer. Its value is approximately 299,792,458 meters per second. This principle is one of the fundamental postulates of the theory of relativity. When light passes through a medium, such as air, water or glass, its speed may decrease due to the interaction with the matter in that medium. However, once the light leaves the medium, its speed returns to the constant value of c in the vacuum. . Response in Sesotho: Lebelo la khanya, leo hangata le hlalosoang e le c, le lula le le sebakeng se le seng, ho sa tsotelehe motsamao oa mohloli kapa moshebelli. Boleng ba eona ke limithara tse ka bang 299,792,458 ka motsotsoana. Molao-motheo ona ke e ngoe ea lintlha tsa motheo tsa khopolo ea kamano. Ha leseli le feta ka hara seaplane, joalo ka moea, metsi kapa khalase, lebelo la lona le ka na la fokotseha ka lebaka la ho sebelisana le taba sebakeng seo. Leha ho le joalo, hang ha leseli le tloha bohareng, lebelo la lona le khutlela boleng bo sa feleng ba c sebakeng sa vacuum. 