greyson96
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An illuminated object is 20 cm from the center of a convex lens. A focused image is formed on a screen 100 cm from the lens. What is the focal length of the lens?

Respuesta :

samuelonum1

The focal length of the conves lense with image distance of 100cm and object distance of 20cm is f = 10cm

Convex Lense

Given Data

  • Object Distance u = 20 cm
  • Image Distance v = 100 cm

We know that the expression for calculating the Focal lenght is given as

F = (uv)/(u + v) cm

Substittuting the Given Parameter into the expression we have

F = 20*100/20+100

F = 1200/120

F = 10 cm

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