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.
Mirror formula and magnification
Usually 3 marks a paper · mostly case-based questions and very short answers · asked in 2 of the last papers
Notes are being written
The board questions below are real and complete — they come from the CBSE papers themselves. The written notes for this topic are still being prepared.
Board questions on this topic
4 from the CBSE papers we hold — the exact wording the board used.
concave mirrors A (f=20 cm, u=45 cm), B (f=15 cm, u=30 cm), C (f=30 cm, u=20 cm).
An object is placed at a distance of 18 cm from the pole of a concave mirror of focal length 12 cm. Find the position of the image formed in this case.
the sharp bright spot formed by a concave mirror focusing the sun's rays is its principal focus.
If the distance between the mirror and the principal focus is 15 cm, find the radius of curvature of the mirror.
concave mirror numerical - internal choice for sub-part (c).
An object 10 cm in size is placed at 100 cm in front of a concave mirror. If its image is formed at the same point where the object is located, find: (i) focal length of the mirror, and (ii) magnification of the image formed with sign as per Cartesian sign convention.