How can I calculate the focal point of concave mirror? Physics Light and Reflection Curved Mirrors 1 Answer ali ergin Feb 16, 2016 #f=R/2# #f=(i*o)/(i+o)# Explanation: #"f:focal point"# #"R:the center of curvature"# #"i:distance between image and vertex(mirror's center)"# #"o: distance between object and vertex"# #f=R/2# #"or"# #1/f=1/(o)+1/i# #1/f=(i+o)/(i*o)# #f=(i*o)/(i+o)# Answer link Related questions Where is the object located if the image that is produced by a concave mirror is smaller than the object? If an object is placed 25.0 cm from a concave mirror whose focal length is 5.0 cm, where is the... If a concave mirror with a focal length of 10.0 cm creates a real image 30.0 cm away on its... Why are concave mirrors used in headlights? Why are concave mirrors used in solar cookers? What are convex mirrors used for? How does a convex mirror affect light rays? How are concave mirrors used in telescopes? What is an example of a concave mirror practice problem? What are some examples of convex mirrors? See all questions in Curved Mirrors Impact of this question 27182 views around the world You can reuse this answer Creative Commons License