Question

Which describes the focal point of a spherical concave mirror?

Question 5 options:

Where a virtual image appears

Where parallel beams along the axis intersect

Where beams from the same part of a nearby object intersect

At a distance of the sphere's radius divided by 2 from the mirror, on the object side

Answer 1

Solution) For any spherical mirror we have R=2f

Here R is radius of curvature and F is focal length

So f=R/2

So the option is last option i . e; At a distance of the spheres radius divided by 2 from the mirror on the object side