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
What is the colour of the light emitted by the Sun?
Lightning occur in the sky when two clouds:
With reference to street-lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street lights, sodium lamps have a longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below.
Which one of the following is a reason why astronomical distances are measured in light-years?
In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?
1. Area of the hole in the lid
2. Temperature of the flame
3. Weight of the lid
Select the correct answer using the code given below.
