Question
An object is placed at infinity in front of a concave mirror. Where is the image formed?
The correct answer is
At the principal focus (F)
Concave Mirror Image Formation: Object at Infinity
When an object is placed at infinity in front of a concave mirror, the rays of light coming from the object are parallel to the principal axis.
Ray Behavior and Convergence
- Parallel rays striking the concave mirror reflect and converge at a specific point.
- According to the laws of reflection, all parallel rays converge at the principal focus (F) of the concave mirror after reflection.
Image Location
Therefore, when the object is at infinity:
- The image is formed at the principal focus (F).
- The image is highly diminished (point-sized), real, and inverted.
The correct option is that the image is formed at the principal focus (F).
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Important Questions from Mirrors and Images
What type of mirror is used in the headlights of vehicles?
- 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
An object is placed at a distance of \(\frac{f}{2}\) from a convex lens. The image will be
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)
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