Correct Option Analysis for Concave Mirrors
The question asks to identify the correct statement regarding concave mirrors.
Analyzing the Options
- Option 1: Concave mirrors can produce both real (when the object is beyond the focal point) and virtual (when the object is between the pole and focal point) images. Thus, stating they *always* produce virtual images is incorrect.
- Option 2: Concave mirrors can produce magnified images. This happens when the object is placed between the principal focus and the pole of the mirror, resulting in a magnified, virtual, and erect image. Hence, this statement is incorrect.
- Option 3: Dentists use concave mirrors as dental mirrors. This application relies on the mirror's ability to produce a magnified, virtual, and erect image of the teeth when the teeth are placed within the focal length of the mirror. This allows for a closer and more detailed examination. This statement is correct.
- Option 4: Rear-view mirrors in vehicles are typically convex mirrors, not concave. Convex mirrors provide a wider field of view and produce diminished, virtual images. This statement is incorrect.
Conclusion on Concave Mirror Usage
Based on the analysis, the correct statement is that concave mirrors are used by dentists to see enlarged images of teeth.
Important Questions from Physics
Two balls, A and B, are thrown simultaneously, a vertically upward with a speed of 20 m/s from the ground and B vertically downward from a height of 40 m with the same speed and along the same line of motion. At what points do the two balls collide by taking acceleration due to gravity as 9.8 m/s 2?
On the basis of which principle does soap clean surfaces?
Which one of the following devices is used to measure atmospheric pressure?
Which one of the following energy is stored in the links between the atoms?
Who among the following has explained the phenomenon of photoelectric effect?
