Magnification Determines Image Nature
The magnification ($m$) of a mirror provides information about the image's orientation and size relative to the object.
- Sign of Magnification:
- A positive sign indicates that the image is virtual and erect.
- A negative sign indicates the image is real and inverted.
- Magnitude of Magnification:
- If $ |m| > 1 $, the image is enlarged.
- If $ |m| < 1 $, the image is diminished.
- If $ |m| = 1 $, the image is the same size as the object.
Analyzing the Given Magnification
In this case, the magnification produced by the concave mirror is given as $ m = +3 $.
- Since the sign is positive (+), the image formed is virtual and erect.
- Since the magnitude $ |m| = |+3| = 3 $, which is greater than 1, the image is enlarged.
Combining these observations, the image formed by the concave mirror when the magnification is +3 is virtual, erect, and enlarged.
Similar Questions
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When an object is kept at a distance 20 cm in front of a concave mirror, a real image is formed at the centre of curvature of the mirroe. Magnification produced by the mirroe is ______________ .
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Important Questions from Mirrors and Images
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If an object is placed $20 \text{ cm}$ in front of this mirror, what will be the nature and magnification of the image formed? The number of images observable between two parallel mirror is
Which of the following pair is correct?
I. Mirror formula : (1/v) – (1/u) = (1/f)
II. Lens formula : (1/v) + (1/u) = (1/f)
- A beam of parallel light, originating from a distant source, is first incident on a convex lens with focal length $f_2$.
Subsequently, the light passes through the lens and then reflects from a concave mirror having a focal length $f_1$.
The concave mirror is placed at a distance $d$ from the convex lens.
For the light rays to retrace their original path and ultimately emerge from the lens as a parallel beam heading back towards the distant source, the separation distance $d$ between the lens and the mirror must be: A ray of light is made incident on a concave mirror, parallel to its principal axis. After reflection it will -
