Spherical mirror formula relating an object distance ‘u’, image distance ‘v’ and focal length of mirror ‘f’ may be applied to a plane mirror when
focal length goes to infinity.
A plane mirror is the limiting case of infinite radius of curvature and infinite focal length. The mirror equation then gives equal and opposite signed object and image distances.
\(\frac1u+\frac1v=\frac1f\to0\quad\Rightarrow\quad v=-u\)
Similar Questions
The image of an object formed by a plane mirror is
The correct relation between the radius of curvature R and focal length f of a spherical mirror is
The image we see in plane mirror is
According to the New Cartesian Sign Convention, which one of the following is correct is respect of the formula \(\dfrac{1}{f} = \dfrac{1}{v}+ \dfrac{1}{u}\) , where symbols have their usual meanings?
Which one of the following telescopes contains only mirrors?
- It has been observed that a mirror always forms the image between the pole and the focus, irrespective of the location of the object. Which one of the following is correct in respect of the nature of the mirror?
A rectangle ABCD is kept in front of a concave mirror of focal length f with its corners A and B being, respectively, at distances 2f and 3f from the mirror with AB along the principal axis as shown in the figure. It forms an image A'B'C'D' in front of the mirror. What is the ratio of B'C' to A'D'?
- An object is placed far beyond the centre of curvature of a concave mirror. The object then starts accelerating towards the mirror. Which one of the following is correct?
Important Questions from Mirrors and Images
- A concave mirror forms a real and inverted image of a distant object at a distance of $15 \text{ cm}$ from the mirror.
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 -
