alleryଏକ ମାଧ୍ୟମର ପ୍ରତିସରଣାଙ୍କ (refractive index) କୁ କିପରି ସଂଜ୍ଞାୟିତ କରାଯାଏ:
Aମାଧ୍ୟମରେ ଆଲୋକର ବେଗ / ଶୂନ୍ୟରେ ବେଗ
Bଶୂନ୍ୟରେ ଆଲୋକର ବେଗ / ମାଧ୍ୟମରେ ଆଲୋକର ବେଗ
Cଆଲୋକର ବେଗ × ଆବୃତ୍ତି
Dଆଲୋକର ବେଗ × ତରଙ୍ଗଦୈର୍ଘ୍ୟ
Answer & Solution
Correct answer: B. ଶୂନ୍ୟରେ ଆଲୋକର ବେଗ / ମାଧ୍ୟମରେ ଆଲୋକର ବେଗ
n = ଶୂନ୍ୟରେ ଆଲୋକର ବେଗ (c) / ମାଧ୍ୟମରେ ଆଲୋକର ବେଗ (v)।
ଘନ ମାଧ୍ୟମରେ ଆଲୋକ ମନ୍ଥର ହୋଇଯାଏ, ତେଣୁ ସର୍ବଦା n > 1 ହୁଏ।
ଜଳ n = 1.33, କାଚ n = 1.5, ହୀରା n = 2.42।
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