List of top Science Questions on Light - Reflection and Refraction asked in CBSE Class X

An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position of the image formed by the mirror.
A student has three convex lenses A, B, and C of different focal lengths. He wants to observe the images formed by these lenses on a screen by placing a candle flame at different distances as given in the following table:
Case No.LensFocal LengthObject Distance
1\(A\)50 cm25 cm
2B20 cm60 cm
3C15 cm30 cm
When an object is placed beyond 2F of a convex lens, the nature of the image formed is :
When a narrow beam of white light passes through a glass prism it splits into its component colours. This phenomenon is called :
“A ray of light incident on a rectangular glass slab immersed in any medium emerges parallel to itself.” Draw a labelled ray diagram to justify this statement.
The absolute refractive indices of water and glass are $\frac{4}{3}$ and $\frac{3}{2}$ respectively. If the speed of light in glass is $2 \times 10^8$ m/s, find the speed of light in (i) water and (ii) vacuum.
If a ray of light enters obliquely from glass to water, will it bend towards the normal or away from the normal?

Absolute refractive indices of water and glass are $\frac{4}{3}$ and $\frac{3}{2}$ respectively. In which one of the two media is the speed of light more?

Define the term absolute refractive index of a medium.
What is Tyndall effect? Give two examples where this phenomenon is observed. Give reason to explain this phenomenon.

Draw a labelled ray diagram for the image formation by a concave mirror when an object is placed between its centre of curvature and focus.

Find the magnification of the image formed by a spherical mirror from the following data :
$u = -20$ cm,  $f = -15$ cm.

Assertion (A) : A rainbow is an artificial spectrum of white light appearing in the sky after a rain shower.
Reason (R) : The water droplets act like small prisms.