Class 10 Exam > Class 10 Videos > Mirror Formula and Magnification - Light - Reflection and Refraction, Class 10 Science
Mirror Formula and Magnification - Light - Reflection and Refraction, Class 10 Science Video Lecture
FAQs on Mirror Formula and Magnification - Light - Reflection and Refraction, Class 10 Science Video Lecture
| 1. What is the mirror formula? |  |
Ans. The mirror formula is a mathematical equation that relates the object distance (u), the image distance (v), and the focal length (f) of a mirror. It is given by the formula: 1/f = 1/v + 1/u.
| 2. How is the magnification of an image determined? | |
Ans. The magnification of an image formed by a mirror is determined by the ratio of the height of the image (h') to the height of the object (h). It is given by the formula: magnification (m) = -v/u = h'/h, where v is the image distance and u is the object distance.
| 3. What does a positive magnification value indicate? | |
Ans. A positive magnification value indicates that the image formed by the mirror is virtual, upright, and enlarged compared to the object. This means that the image is formed on the same side as the object.
| 4. How is the sign convention for mirror formula and magnification determined? | |
Ans. In the mirror formula and magnification equations, the sign convention is as follows:
- The object distance (u), focal length (f), and image distance (v) are positive for real objects and images formed on the same side as the object.
- The object distance (u), focal length (f), and image distance (v) are negative for virtual objects and images formed on the opposite side of the object.
- The height of the object (h) and image (h') are positive for upright images and negative for inverted images.
| 5. How can the mirror formula and magnification be used to determine the position and nature of an image formed by a mirror? | |
Ans. By using the mirror formula and magnification equation, we can calculate the position and nature of an image formed by a mirror. If the value of the image distance (v) is positive, the image is real and formed on the same side as the object. If the value of the image distance (v) is negative, the image is virtual and formed on the opposite side of the object. The magnification value indicates whether the image is enlarged or reduced compared to the object, and its sign determines whether the image is upright or inverted.
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