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Understanding Concave Mirror and Image Formation by it Video Lecture | Science Class 7 (Old NCERT)
FAQs on Understanding Concave Mirror and Image Formation by it Video Lecture - Science Class 7 (Old NCERT)
| 1. What is a concave mirror and how does it work? |  |
Ans. A concave mirror is a mirror with a curved inward surface. It works by reflecting light rays that strike it inward, converging them towards a specific point called the focal point. This mirror can form both real and virtual images, depending on the position of the object relative to the mirror and the location of the focal point.
| 2. What is the difference between a concave and convex mirror? | |
Ans. The main difference between a concave and convex mirror lies in their curved surfaces. A concave mirror has a curved inward surface, while a convex mirror has a curved outward surface. Additionally, a concave mirror can form both real and virtual images, whereas a convex mirror can only form virtual images.
| 3. How is an image formed by a concave mirror? | |
Ans. The image formed by a concave mirror depends on the position of the object relative to the mirror. When the object is placed beyond the focal point, a real and inverted image is formed between the focal point and the mirror. When the object is placed between the focal point and the mirror, a virtual and magnified image is formed on the same side as the object. When the object is placed at the focal point, no image is formed.
| 4. What is the focal point of a concave mirror? | |
Ans. The focal point of a concave mirror is the point at which parallel rays of light, when reflected, converge or meet. It is located on the principal axis, halfway between the center of curvature and the mirror's surface. The distance between the focal point and the mirror is known as the focal length.
| 5. How can concave mirrors be used in everyday life? | |
Ans. Concave mirrors have various applications in everyday life. They are used in car headlights to focus the light and create a stronger beam. They are also used in makeup mirrors to magnify the reflection and provide a clear view of the face. Concave mirrors are also used in telescopes and satellite dishes to collect and focus light or radio waves, respectively.
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