If a convex lens is cut horizontally from optical axis i.e., from middle, 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.
What happen when lens is cut perpendicularly?
Complete step-by-step answer: Assuming the direction of light along positive x-direction. So,
the focal length of the equi-convex lens gets doubled
when it is cut through the optical centre perpendicular to the principal axis.
What happens when lens is cut vertically?
Complete step by step answer:
When the lens is cut horizontally then the focal length of the lens but when the lens is cut vertically then
the focal length of the lens changes
. The focal length of the lens is given by, … As the lens is cut vertically the half of the lens is cut away, therefore ${R_2} = 0$.
What happens when lens is cut perpendicular to principal axis?
Answer Expert Verified. If lens is cut along the principal axis then there will be no change in the focal length of lens. but it is cut perpendicular to principal axis, then
focal length will be twice the original one
.
What will happen to the focal length if a convex 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
.
What change do you observe if a lens is placed in water instead of air with respect to its focal length?
Since the relative refractive index of glass with respect to water is less than that of glass with respect to air, the bending of light at the interface of glass water is lesser and hence a
parallel beam of light falling on the lens is bent less
, to meet at point on the principal axis and hence the lens has more focal …
How are convex lenses used in everyday life?
Convex lenses are used
in microscopes, magnifying glasses and eyeglasses
. They are also used in the cameras to create real images of objects present at a distance.
What is Equiconvex lens?
Hint: An equiconvex lens is nothing but
a double convex lens which has two convex spherical surfaces of equal radii of curvature
. Using the lens formula, an expression for focal length of the given equiconvex lens is derived.
What do lenses do?
Lens, in optics, piece of glass or other transparent substance that is
used to form an image of an object by focusing rays of light from the object
.
What is the magnification produced by a concave lens?
When an object is kept in front of a concave mirror, it produces an upright, virtual and reduced in size image which is on the side of the object. As the image produced is reduced in size, hence the magnification produced is
less than 1
as image height is less than the object height. Hence, Option A is correct.
What is it called when an object is cut into two equal halves?
An object or a figure is said to be symmetrical if it can be divided into two halves that are exactly equal. The line that divides the object or the figure into two equal halves or congruent halves is called the
line of symmetry or the Mirror Line
.
When an Equiconvex lens is placed over a plane mirror?
an equiconvex lens is placed over a plane mirror as indicated in diagram and object placed 12 cm from system such that image and object inside a liquid is power between mirror and lens and for the same object Rai image now formed at 24 cm from the refractive index of the liquid word will be system such that image and …
What does a double convex lens do?
A double convex lens, or converging lens,
focuses the diverging, or blurred, light rays from a distant object by refracting (bending) the rays twice
.
What is the power of a concave lens of focal length 2m?
The given focal length of the concave lens is f = -2 m. It is
negative
because a concave lens always has a negative focal length. The unit of power is dioptre (D) and 1D = 1m
– 1
.
What is the focal length of Equiconvex lens?
The focal length of an equiconvex lens is
equal to the radius of curvature of either face
.
What will be the effect on focal length and power of a concave lens when it cut into two equal parts as shown in the diagram?
(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.
