The distance of the image from the mirror provides an approximate value for the focal length of the concave mirror. This distance represents the point where sunlight is effectively concentrated, leading to the ignition of the paper.
How can the distance of the image from the mirror be utilized to determine the focal length of the concave mirror?
Share
The focal length (f) of a concave mirror can be determined using the mirror formula:
1/f= 1/u+ 1/v, Measure the object distance (u) and the image distance (v), then substitute into the formula.
Solving for f, you get f = u+v/uv. By utilizing this formula, the distance of the image from the mirror serves as a crucial parameter in calculating the focal length. This method is commonly employed in experimental setups to precisely characterize the optical properties of concave mirrors.