physique chimie college lycee
CONVERGING LENS

 

CONVERGING LENS - thin lens -

Focal length

 

 

Description: Interactive simulation to learn how to get an clear image of an object on a screen. Front focal point - back focal point - front focal length (distance) FFL - back focal length (distance) BFL - optical axis - focus - optical center

 

Definitions

Converging lens: A converging lens focuses diverging or blurry light rays from a distant object by refracting (bending) the rays twice. Its curvature converts rays to a focal point behind the lens so that a sharper image can be seen or captured on a screen or camera sensor.

Focal point (principal focus): it is a point on to which light parallel to the axis is focused. Since light can pass through a lens in either direction, a lens has two focal points.

Focal length: distance from the lens principal plane to the focus.

Thin lens: thickness is very small compared to focal length.

 

flash animation        .exe (Windows)        .app (Mac)        video

 

 

 

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