A ray parallel to the axis of a concave lens will refract through the lens and appear to have come from the focal point on the same side as the object.
A ray of light traveling parallel to the principal axis of a concave mirror will be reflected through the focal point of the mirror after reflection.
The tendency in case of concave lens would be diverging one. When parallel rays fall one side of the concave lens then due to divergence they appear to come, note down that "they appear to come" from a point on the same side. And this point is named as the virtual focus of the concave lens. Now as a ray passes through this virtual focal point that will be definitely a diverging one. Now due to diverging action of the lens, that ray will be further diverged and that will appear to come from a virtual point on the same side and some what nearer to the concave lens. Hence the image will be virtual and diminished and erect one.
If a ray of light enters a transparent object like water or glass at an angle the path of the ray is deflected. When it emerges, it's deflected again, but in the opposite direction if the ingoing plane and the outgoing plane are parallel to one another. This effect is known as refraction. When a parallel ray hits a convex lens this refraction causes it to emerge as a non-parallel ray and there will be a point at which the ray becomes very narrow - maybe showing as a spot of light. This is the point of focus. If the lens is concave, the effect is reversed and the ray emerges as a steadily expanding ray.
After passing through a diverging lens, a focal ray will diverge away from the principal axis of the lens.
The focus of a concave mirror is the point on its optical axis where light rays parallel to the axis converge after being reflected.
A ray of light traveling parallel to the principal axis of a concave mirror will be reflected through the focal point of the mirror after reflection.
The tendency in case of concave lens would be diverging one. When parallel rays fall one side of the concave lens then due to divergence they appear to come, note down that "they appear to come" from a point on the same side. And this point is named as the virtual focus of the concave lens. Now as a ray passes through this virtual focal point that will be definitely a diverging one. Now due to diverging action of the lens, that ray will be further diverged and that will appear to come from a virtual point on the same side and some what nearer to the concave lens. Hence the image will be virtual and diminished and erect one.
If a ray of light enters a transparent object like water or glass at an angle the path of the ray is deflected. When it emerges, it's deflected again, but in the opposite direction if the ingoing plane and the outgoing plane are parallel to one another. This effect is known as refraction. When a parallel ray hits a convex lens this refraction causes it to emerge as a non-parallel ray and there will be a point at which the ray becomes very narrow - maybe showing as a spot of light. This is the point of focus. If the lens is concave, the effect is reversed and the ray emerges as a steadily expanding ray.
After passing through a diverging lens, a focal ray will diverge away from the principal axis of the lens.
The focus of a concave mirror is the point on its optical axis where light rays parallel to the axis converge after being reflected.
no
This depends on the type of lens. If it is a convex lens then they converge at the focus on the other side of the lens. If it is a concave lens, then they diverge and appear to be coming from the focus present on the same side of the lens as the incident ray.
focus
It is reflected back parallel to the principal axis. (apex)
a concave lens diverges the light ray travelling in a straight parallel path.
Any ray that travels parallel to the principal axis of a concave mirror will reflect through the mirror's focus after reflection. This is known as the "law of reflection" for concave mirrors.
An incident ray that passes through the focal point of a lens will emerge parallel to the principal axis. This is a property of convex lenses.