The item should be placed far enough away from the concave mirror for the image to develop at the focus when calculating the focal length of a concave mirror. This is accomplished by utilising a concave mirror to concentrate a distant object, such as a tree. The concave mirror’s focus creates a crisp image of the tree. As a result, the image’s distance from the concave mirror will be equal to the concave mirror’s focal length.
Briefly describe how you would find the focal length of a concave mirror quickly but approximately.
Briefly describe how you would find the focal length of a concave mirror quickly but approximately.