What is Focus in physics?
In geometrical optics, a focus, also called an image point, is the point where light rays originating from a point on the object converge. A principal focus or focal point is a special focus: For a lens, or a spherical or parabolic mirror, it is a point onto which collimated light parallel to the axis is focused.
How to Calculate Focal Length of Concave Mirror?
Focal Length of Concave Mirror calculator uses Focal Length of Concave Mirror = -Radius/2 to calculate the Focal Length of Concave Mirror, Focal length of Concave mirror is the distance of the focus from the pole of the mirror. Focal Length of Concave Mirror is denoted by Fconcave symbol.
How to calculate Focal Length of Concave Mirror using this online calculator? To use this online calculator for Focal Length of Concave Mirror, enter Radius (rcurve) and hit the calculate button. Here is how the Focal Length of Concave Mirror calculation can be explained with given input values -> -4.5 = -9/2.