The correct Answer is
A-1, B-2, C-3, D-4
Explanation
This question pertains to the applications of spherical mirrors, specifically concave and convex mirrors, based on their optical properties of reflection and image formation.
Statement-wise Analysis
- A. Headlight of a car - 1. Used to produce a powerful parallel beam of light
- Correct. Car headlights use concave mirrors. A light bulb is placed at the principal focus of a concave mirror. The light rays diverging from the bulb, after reflection from the concave mirror, become parallel to the principal axis, forming a powerful parallel beam.
- B. Dentist’s mirror - 2. Used to see a large image of teeth
- Correct. Dentists use concave mirrors. When an object (tooth) is placed between the pole and the principal focus of a concave mirror, it forms a virtual, erect, and magnified image. This allows the dentist to see a larger image of the tooth.
- C. Solar furnace - 3. Used to concentrate sunlight to produce heat
- Correct. Solar furnaces utilize large concave mirrors (or parabolic reflectors). These mirrors collect parallel rays of sunlight and converge them at their principal focus, producing a high concentration of heat.
- D. Rear-view mirror - 4. Used to get a wider field of view
- Correct. Rear-view mirrors in vehicles are convex mirrors. Convex mirrors always form virtual, erect, and diminished images. More importantly, they have a wider field of view compared to plane or concave mirrors, enabling the driver to see a larger area behind the vehicle.
Key Takeaway
Concave mirrors are used for converging light (headlights, solar furnaces) and producing magnified images (dentist's mirror), while convex mirrors are used for diverging light and providing a wider field of view (rear-view mirrors).