Describe an experiment to find the focal length of a concave mirror and to find the nature of the image when the object is at a finite distance.
Describe an experiment to find the focal length of a concave mirror and to find the nature of the image when the object is at a finite distance.
Apparatus Required: Concave mirror, screen, scale.
Procedure:
1. Place a concave mirror.
2. Focus the mirror on a distant object.
3. Place a screen and adjust the position such that a clear sharp image of a distant object is formed on it.
Observation:
1. Distance of the screen from the concave mirror gives the focal length of the mirror.
2. The image formed on the screen is smaller in size than the object.
3. The image obtained on-screen is inverted.
4. It is a real image because it can be seen on the screen.
Thus, the distance of the screen from the mirror gives focal length and the nature of the image is real, inerted, and diminished.
Apparatus Required: Concave mirror, screen, scale.
Procedure:
1. Place a concave mirror.
2. Focus the mirror on a distant object.
3. Place a screen and adjust the position such that a clear sharp image of a distant object is formed on it.
Observation:
1. Distance of the screen from the concave mirror gives the focal length of the mirror.
2. The image formed on the screen is smaller in size than the object.
3. The image obtained on-screen is inverted.
4. It is a real image because it can be seen on the screen.
Thus, the distance of the screen from the mirror gives focal length and the nature of the image is real, inerted, and diminished.
