Any incident ray traveling parallel to the principal axis of a converging lens
What happens to the light ray which travel along the principal axis?
One ray of light becomes parallel to the principal axis of the lens and thus,
passes through another focus after refraction through the lens
. Another ray of light passes through the optical centre of the lens and goes straight.
What happens if the ray passes through principal axis?
Rule 1:
When a ray of light which is parallel to the principal axis gets reflected, it passes through its focus
. Rule 2: When a ray of light passes through the centre of curvature, it gets reflected back along the same path.
What happens to a ray that travels along the principal axis and centre of curvature?
Ray passing through the Centre of curvature:
In the case of convex mirror: Ray appears to passing through or directed towards the centre of curvature
goes parallel to the principal axis after reflecting from the surface of a convex mirror
.
What is the principal axis in a ray diagram?
It is
a horizontal line that passes through
the paole of the lens or mirror. The principal focus of a convex lens (sometimes called the focal point) it is the point on the principal axis, through which rays of light, travelling near to and parallel to the principal axis, pass after refraction by the lens.
Why does a ray parallel to principal axis passes through focus?
As you know the image of an object, whose distance from mirror is infinite, form at focus and you must have observed that rays from infinity are all parallel to principal axis. Now your question, if rays are parallel to principal axis then they must pass through focus
because they are same as rays coming from infinity
.
What happens when light passes through concave lens?
When parallel rays of light enter a concave lens,
the light waves refract outward, or spread out
. The light rays refract twice: first when entering the lens and second when leaving the lens. Only the light rays passing through the center of the lens remain straight.
What is the incident ray?
An incident ray is
a ray of light that strikes a surface
. The angle between this ray and the perpendicular or normal to the surface is the angle of incidence. The reflected ray corresponding to a given incident ray, is the ray that represents the light reflected by the surface.
What type of mirror is curved outward?
A mirror that curves outward like the back of a spoon is called a
convex mirror
. the image formed by a convex mirror is a virtual image. is always upright and smaller than the actual object is. Because convex mirrors cause light rays to diverge, they allow large areas to be viewed.
What type of image is formed when rays of light actually intersect?
A real image
occurs when light rays actually intersect at the image, and is inverted, or upside down. A virtual image occurs when light rays do not actually meet at the image. Instead, you “see” the image because your eye projects light rays backward. A virtual image is right side up (upright).
Are passing through the centre of curvature?
The ray of light passes through the centre of curvature of a concave mirror it strikes the mirror along the normal ray, it incidences on to the mirror at an angle of 90 degrees. … angle of reflection = 0, Hence, the angle of reflection tends to zero degree, thus the ray of light retraces its path.
What happens when a ray parallel to the principal axis passes through a concave mirror?
Concave mirrors
produce a real image at the focal point
(labelled F in the diagram below) when parallel rays are incident parallel to the principal axis, which passes through the centre of curvature of the mirror (labelled C). … An object at F will produce an image at infinity.
Which type of image is formed by a convex mirror?
Image formed by a convex mirror is always
virtual and erect
. When an object is placed at infinity, virtual image is formed at focus and the size of the image is smaller.
Are virtual images always upright?
Virtual images are
always located behind the mirror
. Virtual images can be either upright or inverted. Virtual images can be magnified in size, reduced in size or the same size as the object. … Virtual images result when the reflected light rays diverge.
Can we see real image in concave mirror?
A real image occurs where rays converge, whereas a virtual image occurs where rays only appear to diverge. Real images can be produced by concave mirrors and converging lenses, only
if the object is placed further away from the mirror/lens than the focal point
, and this real image is inverted.
