EVERYDAY SCIENCE

Detailed explanation-1: -the p; onit where light rays meet is known as Focus or focal point.

Detailed explanation-2: -Hence, the point on the principal axis where all the light rays meet or appear to meet is called the principal focus.

Detailed explanation-3: -A focal point is a common point on the principal axis where all the light rays starting from the object converge. The focal point has a spatial extent known as the blur circle. This non-ideal focusing may occur due to aberrations of the imaging optics.

Detailed explanation-4: -Virtual image is the image which forms when the light rays appear to meet at a point after the reflection. These images cannot be obtained on a screen and hence termed as virtual image.

Detailed explanation-5: -property of lenses and mirrors The focus is the point, or plane, at which light rays from infinity converge after passing through a lens and traveling a distance of one focal length.