How do we identify or interpret when to get the screen away or towards the mirror in different situations? Please tell me diff. cases---phy practicals
To identify or interpret when to move the screen away or towards the mirror in different situations in physics practicals, you need to understand the concepts of image formation by a mirror and the properties of the image formed.
When dealing with mirrors, there are two types to consider: concave and convex mirrors. Let's discuss both cases:
1. Concave Mirror:
- Case 1: Object Beyond the Center of Curvature:
- If the object is placed beyond the center of curvature of a concave mirror, the image formed will be real, inverted, and smaller in size than the object.
- To locate the image, move the screen away from the mirror until a clear image is formed on the screen.
- Case 2: Object at the Center of Curvature:
- When the object is placed at the center of curvature of a concave mirror, the image formed will be real, inverted, and have the same size as the object.
- Move the screen towards or away from the mirror until the image is focused and clearly formed on the screen.
- Case 3: Object Between the Center of Curvature and the Focal Point:
- If the object is placed between the center of curvature and the focal point of a concave mirror, the image formed will be real, inverted, and magnified.
- Move the screen towards the mirror until a sharp, magnified image is formed on the screen.
2. Convex Mirror:
- Convex mirrors always produce virtual, upright, and diminished images, regardless of the object's position.
- You don't need to move the screen since the image is always formed behind the mirror.
In both cases, it's important to keep in mind that the distance between the mirror and the screen should be adjusted until a clear and focused image is obtained. You may need to experiment with the distance by trial and error to achieve the best results.