What is the focal length of a Biconvex lens?
Table of Contents
- 1 What is the focal length of a Biconvex lens?
- 2 When a lens of focal length f is cut?
- 3 What happen when lens is cut perpendicularly?
- 4 What is the difference between Plano convex and biconvex lenses?
- 5 What happens when you cut a lens in half?
- 6 What happens if the lens is cut perpendicular to the principal axis?
What is the focal length of a Biconvex lens?
A biconvex lens has a focal length 2/3 times the radius of curvature of either surface.
When a lens of focal length f is cut?
In this process, a layer of the lens t in thickness is lost, then the halves are put together to form a composite lens. In between the focal plane and the composite lens, a narrow slit is placed near the focal plane.
What happen when lens is cut perpendicularly?
If the lens is cut along the principal axis, then there will be NO change in the focal length of the lens. But, if it is cut perpendicular to the principal axis, then the focal length will be twice the original one.
How will you calculate the focal length of Biconvex lens?
How will you calculate the focal length of a biconvex lens that is used to correct the defect f hypermetropia? Explain it mathematically.
- 1f=1v-1u.
- ⇒1f=1-d-1-25.
- 1f=125-1d.
What is the focal length of a biconvex lens?
If the biconvex lens can focus light from point F1 to F2, both distance f from the lens, then when you cut the lens in half, each half will have a focal length equal to f. The focal length of the biconvex lens is f / 2. The general lensmaker’s equation, from Wikipedia, is
What is the difference between Plano convex and biconvex lenses?
So then the focal length of a plano convex lens is twice that of the biconvex lens. If you place a light source at 2f from a biconvex lens and then proceed to cut it, you will get collimated light.
What happens when you cut a lens in half?
It might help to think about the symmetry of a sliced biconvex lens. If the biconvex lens can focus light from point F1 to F2, both distance f from the lens, then when you cut the lens in half, each half will have a focal length equal to f.
What happens if the lens is cut perpendicular to the principal axis?
(ii) If the lens is cut perpendicular to the principal axis than the focal length will change it will be twice the focal length of the original lens because the radius of curvature will increase and R = 2F. Please log in or register to add a comment.
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