......the focus of a concave and convex both r same....
Sankim answered this
The principle focus of a concex lens
A ray is a parallel of the principle axis and at point the principle focus after passes through the convex lens. This phenomeno is called the principle focus of a covex lens.
vidhyasweet97... answered this
The reflected rays appear to come from a point on the principal axis. And this point is called the principal focus of the convex mirror.
Aaisha answered this
define focus of convex mirror i did not get a niceanswer
Rasheda V.m. answered this
The parallel rays reflect and appear to meet at a point on the principal axis. This point is called principal focus of convex mirror
Shehnas Insha Firose answered this
The principal focus of a convex mirror is the point on the principal Axis from which all the incident rays parallel to principal Axis appear to come after reflection from the convex mirror
Anushka Sinha answered this
The principle focus of convex mirror is that point at which rays parallel to the principal axis appear to meet. I have used "appear to meet" because in case of convex mirror only virtual image is formed.
Fidhaa Hasna answered this
The reflected rays appear to come from a point on the principal axis. This point is called the principal focus of the convex mirror.
Aishez Singh answered this
The focus of a convex mirror is a point on its principal Axis from which a beam of light appears to divert after being reflected from the convex mirror
Abdur Rahman answered this
You have two lenses a and b of local length +10 & -10 respectively.State the nature and power of each lens.Which of the lenses will form a virtual and magnified image of an object placed 8cm from the lens?Draw a ray diagram to justify your answer
ajaypoosala... answered this
The point on principal axis of a spherical mirror where the rays of light parallel to principal axis meet or appear to meet after reflection from a spherical mirror is called principal focus
Rohan answered this
The point on which the reflected rays intersect on the principle axis is known as principle focus.