NEET > Additional Study Material for NEET > L 1 Ray optics- Curved Mirror,Class 12,Physics
L 1 Ray optics- Curved Mirror,Class 12,Physics Video Lecture - Additional Study Material for NEET
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FAQs on L 1 Ray optics- Curved Mirror,Class 12,Physics Video Lecture - Additional Study Material for NEET
| 1. What is a curved mirror and how does it work? |  |
Ans. A curved mirror is a reflective surface that has a curved shape, either concave or convex. It works by reflecting light rays and forming images based on the curvature of the mirror. In a concave mirror, the reflected rays converge at a point called the focus, while in a convex mirror, the rays diverge as if they are coming from a virtual focus behind the mirror.
| 2. What is the difference between a concave and convex mirror? | |
Ans. The main difference between a concave and convex mirror is the way they reflect light. A concave mirror is curved inward and can form both real and virtual images, depending on the position of the object. It is commonly used in telescopes and shaving mirrors. On the other hand, a convex mirror is curved outward and always forms virtual images that are smaller and upright. It is often used as a rear-view mirror in vehicles.
| 3. How is the focal length of a curved mirror determined? | |
Ans. The focal length of a curved mirror can be determined using the mirror formula:
1/f = 1/v + 1/u
where f is the focal length, v is the image distance, and u is the object distance. By measuring the distances of the object and the image from the mirror, the focal length can be calculated. Alternatively, the focal length can also be determined by focusing parallel rays of light onto a point on the principal axis.
| 4. What are the uses of concave and convex mirrors? | |
Ans. Concave mirrors are commonly used in various optical devices such as telescopes, satellite dishes, and makeup mirrors. They can also be found in car headlights and torches to produce parallel beams of light. Convex mirrors, on the other hand, are widely used as rear-view mirrors in vehicles to provide a wider field of view. They are also used in security mirrors to monitor blind spots and in makeup mirrors to magnify the image.
| 5. How can the magnification of an image formed by a curved mirror be calculated? | |
Ans. The magnification of an image formed by a curved mirror can be calculated using the formula:
magnification = height of image / height of object
where the height of the image is the size of the image formed on the screen or detector, and the height of the object is the actual size of the object being reflected. The magnification can be positive for an upright image and negative for an inverted image.
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