✓ Board-verified
Science · 2026 · 2 marks
CBSE 2026 · Region 3 · Set 1 · Q33
A ray of light enters into medium B from medium A as shown in the given figure: (a) Which one of these two media is optically denser than the other…
A ray of light enters into medium B from medium A as shown in the given figure :
(a)
Which one of these two media is optically denser than the other medium ? Justify your answer.
(b)
If the speed of light in medium A is $\displaystyle \mathrm{V}_{\mathrm{A}}$ and in medium B is $\displaystyle \mathrm{V}_{\mathrm{B}}$, then what is the refractive index of medium $\displaystyle \mathrm{B}$ with respect to medium A ?
Marking-scheme solution
(a) Medium A is optically denser than B because light ray is going away from the normal NN'.
(b) \(\displaystyle \mathrm{n}_{\mathrm{BA}}=\frac{V_{A}}{V_{B}}\)
All Light - Reflection and Refraction questions2026 question paperNCERT solutions: Light - Reflection and RefractionPractice Light - Reflection and Refraction →
More from Light - Reflection and Refraction
- With the help of above given ray diagram, calculate the angle of refraction. Given that the refractive index of Medium 2 with respect to Medium 1 is…2026
- A student wants to obtain an erect image of an object using a concave mirror of 10 cm focal length. What will be the distance of the object from…2023
- An object is kept at a distance of 1m from a lens of power+2D: (i) Identify the type of lens. (ii) Calculate its focal length and distance of the…2023
- If the absolute refractive indices of two media X and Y are 6/5 and 4/3 respectively, then the refractive index of Y with respect to X will be:2025
- A student wants to project the image of a candle flame on a screen 60 cm in front of a mirror by keeping the candle at a distance of 15 cm from its…2023
- An object is placed in front of a concave mirror of focal length 12 cm. If distance of the object from the pole of the mirror is 8 cm, then use…2024
- (i) "In refraction of light through a rectangular glass slab, the emergent ray is always parallel to the direction of the incident ray." Why? Explain…2025
- The above ray diagram is to show image formation by a reflecting telescope. Reflecting telescope revolutionized our way of looking into the sky.…2026
CBSE Class 10 Science past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.