Concave Mirror Image Rules
For a concave mirror, the focal length f is positive. The center of curvature C is located at a distance R = 2f from the pole P, and the focus F is at a distance f from P.
Image characteristics depend on the object's position (u):
- Object beyond C (\(|u| > 2f\)): Image is real, inverted, diminished, located between F and C.
- Object at C (\(|u| = 2f\)): Image is real, inverted, same size, located at C.
- Object between C and F (\(f < |u| < 2f\)): Image is real, inverted, magnified, located beyond C.
Object Movement Analysis
The question describes an object moving from beyond the center of curvature towards the focus in front of a concave mirror.
As the object's position u changes from \(|u| > 2f\) towards \(|u| \to f\):
- Object Distance \(|u|\) Decreases: The object gets closer to the mirror.
- Image Position \(|v|\) Increases: The image shifts progressively. It starts between F and C, moves to C (when the object is at C), and then moves beyond C (when the object is between C and F). This indicates the image moves away from the mirror.
- Image Size \(|M|\) Increases: The magnification changes from diminished (when object is beyond C), to same size (at C), to magnified (when object is between C and F). This indicates the image becomes larger.
Image Characteristics Conclusion
Therefore, as the object moves from beyond the center of curvature towards the focus, the image becomes larger and moves away from the mirror.
Similar Questions
- When an object is placed at infinity in front of a convex lens, the image formed is:
- A concave mirror is used in torches and car headlights because it:
- Which of the following statements correctly describes a double concave lens?
A convex mirror of focal length f (in air) is immersed in a liquid . The focal length of the mirror in liquid \(\left( {\mu - \frac{4}{3}} \right)\) will be:
The reflector of a searchlight is a:
If you look into a mirror and find that the image (your reflexion) is smaller than you, then the type of the mirror is:
The focal length of a concave mirror with a radius of curvature of 20.0 cm is:
Find the position of the image formed by a concave mirror when the object is placed between P and F?
A person holding a pen in his left-hand sees his reflection in the mirror holding the pen in his right hand. This is due to which of the following phenomena?
- Complete the statement with correct option.
In dispersion without deviation,_________________
Important Questions from Optics
Which among the following is used as a reflector in search lights?
The incident ray, the ray perpendicular to the point of incidence, and the reflected ray all lie________.
Which is the only event to prove that light is a transverse wave?
A. Scattering of light
B. Interference
C. Diffraction
D. Polarisation
In which a convex mirror is used?
A. Rear View mirrors in vehicles
B. Glass windows
C. Makeup Mirror
D. Kaleidoscope
Which mirror is preferred as a rear-view (wing) mirror in vehicles because of its wider field of view?
