Home › UP Board Class 10 › physics › c10refractionlenses › Per NCERT, the ABSOLUTE REFRACTIVE INDEX of a me…
Per NCERT, the ABSOLUTE REFRACTIVE INDEX of a medium (nm) is defined as which RATIO?
Anm = v × c
Bnm = (speed of light in vacuum/air c) ÷ (speed of light in the medium v) = c/v
Cnm = v/c
Dnm is a random number
Answer & Solution
Correct answer: B. nm = (speed of light in vacuum/air c) ÷ (speed of light in the medium v) = c/v
Per NCERT Eq 9.7, absolute refractive index nm = c/v.
Related questions
Per NCERT, a CONCAVE LENS forms what kind of image — regardless of object position?Per NCERT, a CONVEX LENS forms what kind of image when an object is placed BEYOND 2F₁?Per NCERT §9.3.3, what is the OPTICAL CENTRE of a lens?Per NCERT, kerosene (n = 1.44) is OPTICALLY DENSER than water (n = 1.33) — though kerosenePer NCERT, what is the refractive index of DIAMOND — the HIGHEST among the common materialPer NCERT Table 9.3, what is the refractive index of WATER?Per NCERT, what is the speed of light in a VACUUM?Per NCERT, in refraction through a RECTANGULAR GLASS SLAB, what is the relationship betwee