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Spherical Mirrors Video Lecture - NEET

FAQs on Spherical Mirrors Video Lecture - NEET

1. What are the main types of spherical mirrors?

Ans. The main types of spherical mirrors are concave mirrors and convex mirrors. Concave mirrors curve inward and can focus light to a point, making them useful in applications like shaving mirrors and telescopes. Convex mirrors, which curve outward, disperse light and provide a wider field of view, making them ideal for use in vehicle side mirrors and security applications.

2. How do spherical mirrors form images?

Ans. Spherical mirrors form images based on the position of the object relative to the mirror's focal point. For concave mirrors, if the object is beyond the center of curvature, the image is real, inverted, and smaller. If the object is at the center of curvature, the image is real, inverted, and the same size. If the object is between the focal point and the mirror, the image is virtual, upright, and larger. For convex mirrors, the image is always virtual, upright, and smaller, regardless of the object's position.

3. What is the significance of the focal point in spherical mirrors?

Ans. The focal point is crucial in spherical mirrors as it is the point where parallel rays of light either converge (in concave mirrors) or appear to diverge from (in convex mirrors). The distance from the mirror's surface to the focal point is known as the focal length. Understanding the focal point helps in predicting image formation and is essential for applications like lens and mirror design in optical devices.

4. What are some practical applications of spherical mirrors?

Ans. Spherical mirrors have various practical applications. Concave mirrors are commonly used in reflecting telescopes, makeup mirrors, and dental mirrors due to their ability to magnify images. Convex mirrors are widely used for safety purposes in vehicles and parking lots, as well as in security surveillance, allowing for a broader view of surroundings.

5. How can you determine the nature of the image formed by spherical mirrors?

Ans. To determine the nature of the image formed by spherical mirrors, you can use the mirror formula (1/f = 1/v + 1/u) and ray diagrams. The sign convention helps identify whether the image is real or virtual, upright or inverted, and magnified or reduced. For concave mirrors, if the object is beyond the focal point, the image will be real and inverted; if within, it will be virtual and upright. For convex mirrors, the image is always virtual and upright.

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Oct 13, 2025 Last updated

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