When a lens of focal length f is cut in two pieces Transversly the focal length of each part will become?
(i) If the lens is cut along the principal axis than there will be no change in the focal length of the lens because the radius of curvature will remain the same, hence the focal length will remain unchanged.
What happens to the focal length of convex lens if half a part of the lens is covered?
Therefore, the half part of a convex lens is covered; the focal length does not change, but the intensity of the image decreases.
What will happen to the focal length if a convex lens is cut perpendicularly?
While an equiconvex lens is cut parallel to the principal axis, the focal length remains equal and when the lens is cut perpendicular to the principal axis, the focal length is twice the original.
What happens to the focal length of the convex lens when it is cut horizontally Class 10?
Answer: If a convex lens is cut horizontally then radii of curvature on both sides of the lens i.e., R1 and R2 will remain same as before. As R1 and R2 do not change, so there will be no change in focal length of the lens.
How will focal length of lens affect if 2 I the given lens is placed in water in the given lens is partially covered with opaque material?
Now since the focal length is inversely proportional to the (μ−1), therefore the focal length will increase. Hence the focal length of the lens increases when it is immersed in the water. Hence, Option A is correct.
How does the power of a lens change if its focal length decreases to half?
If its focal length decreases to half, the power of the lens will get doubled.
What happens if convex lens is cut into two halves?
Each half of the lens will still act as an equiconvex lens. Hence, we use the same concept used above to get the focal length of each of the pieces. Hence, each of the pieces becomes a plano-convex lens.
What will happen to the focal length of a convex lens if it is cut into two equal halves making two plano convex lenses?
Focal length of each plano-concave lens will be given as, 1F=(μ-1)(1-R-1∞)=-(μ-1)R here R=∞ for the plane surface Thus focal length of each plano concave lens will be double of the focal length of concave lens. …
What happens when a lens is cut in half?
The focal length will remain constant if a convex lens is cut in half horizontally because the focal length of a lens depends on its two radii of curvature and the material of the lens. As no change in the material or curvature occurs, the focal length of the lens will remain constant.
What is the focal length of a 15 cm equiconvex lens?
An equiconvex lens of focal length 15 cm is cut into two halves. The focal length of each half is 40 cm . An equiconvex lens of focal length 15 cm is cut into two halves. The focal length of each half is 40 cm. =R.
What is the difference between Plano convex and equiconvex lenses?
For equiconvex lens For, the plano-convex lens formed ⇒ f’ = 2f While an equiconvex lens is cut parallel to the principal axis, the focal length remains equal and when the lens is cut perpendicular to the principal axis, the focal length is twice the original.
What happens when an equiconvex lens is cut parallel to the principal axis?
While an equiconvex lens is cut parallel to the principal axis, the focal length remains equal and when the lens is cut perpendicular to the principal axis, the focal length is twice the original. Was this answer helpful? Thank you. Your Feedback will Help us Serve you better.
What is the equation for the half of a circular lens?
Since the two halves are indentical, then f1 = f2. So the equation becomes: Solving for one of the lens half: f1 = 2f. Since it is cut along a diameter (aperture) of the circular boundary of the lens, we have still two surfaces of same radii of curvature in each half.
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