A converging lens of focal length 10cm forms a real image at a distance of 40cm from the lens.determine the object distance
To calculate the object distance, we can use the lens formula:
1/f = 1/v - 1/u
Where:
f = focal length of the lens (10 cm)
v = image distance (40 cm)
u = object distance
Plugging in the values:
1/10 = 1/40 - 1/u
Now, solve for u:
1/u = 1/40 - 1/10
1/u = (1 - 4) / 40
1/u = -3 / 40
u = -40 / 3
Therefore, the object distance is -13.33 cm. This negative sign indicates that the object is located on the same side of the lens as the light source.