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Science · 2025 · 2 marks
Light - Reflection and RefractionRefraction of Light and Refractive Index2 marksApplyvery short answer
CBSE 2025 · Region 6 · Set 1 · Q24
Study the figure in which the path of a ray of light going from Medium 1 to Medium 2 is shown. (a) Out of the two Media - Medium 1 and Medium 2, in…
Study the figure in which the path of a ray of light going from Medium $\displaystyle 1$ to Medium $\displaystyle 2$ is shown.
(a)
Out of the two Media - Medium $\displaystyle 1$ and Medium $\displaystyle 2$, in which is the speed of light more?
(b)
State reason of bending of the refracted ray away from the normal.
(c)
Express refractive index of Medium $\displaystyle 2$ with respect to Medium $\displaystyle 1$ in terms of speed of light in two media.
Marking-scheme solution
(a) Medium $\displaystyle 2$
(b)
Ray bends away from the normal because it is travelling from optically denser medium to rarer medium / speed of light in medium $\displaystyle 2$ increases.
(c) \(\displaystyle \mathrm{n}_{21}=\frac{\text { Speed of light in medium } 1}{\text { Speed of light in medium } 2}\)
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.