A converging lens of focal length 5cm forms a visual image which is 10cm from the lens, how far from the lens is the object
To find the distance from the lens to the object, we can use the lens equation, which relates the object distance (u), the image distance (v), and the focal length (f) of a lens.
The lens equation is given by:
1/f = 1/v - 1/u
Given:
f = 5 cm (focal length)
v = 10 cm (image distance)
To find u, we rearrange the lens equation:
1/u = 1/v - 1/f
Substituting the given values:
1/u = 1/10 - 1/5
To simplify, we find the common denominator:
1/u = (1 - 2)/10 = -1/10
Taking the reciprocal of both sides:
u = -10 cm
Therefore, the object distance from the lens is -10 cm, indicating that the object is located 10 cm to the left of the lens (assuming the positive direction is towards the right).