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Why is the ray of light parallel to the principal axis passes through the focus?
Wiki User
∙ 14y ago
Well this only occurs if the lens is parabolic. It is just a fundamental feature of a parabola to reflected an incident ray parallel to the principal axis through the focal point. That is why lenses etc are parabolic. I dont know if this answers your question (it probably doesnt) but oh well...
Wiki User
∙ 14y ago
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How does light reflect off a convex and concave?
A parallel light source will reflect off a concave mirror and go through a point inside the curve called the focus. Reflecting from a convex mirror will cause all light to bounce off in a straight line away from a focus point behind the mirror.
Why the curved reflecting dish is always concave not convex?
A concave dish, more specifically parabolic or spherical, will focus any parallel rays toward the focal point of the curve. This allows the fish to collect a signal from a large area and focus it into a small area (electronic sensor)
What is the focus and directrix of y equals 8x squared?
Need set of point parabola passes through.X = 1Y = 8----------------(1, 8)For focus,X2 = 4pYinsert values, solve for p(1)2 = 4p(8)= 1/32=======focus- 1/32=======directrix( long time since I have done this. Formula is correct, check my math )
What is the line segment perpendicular to the axis of the parabola and passing through the focus?
It does not have a specific name.
Why the parabolic antenna has parabola shape?
Parallel rays, such as those from a very distance source, are focussed by a parabolic antenna so that they all meet at the focus of the parabola. This results in a stronger signal.
When rays parallel to the principal axis of a concave mirror are reflected the pass though?
That passes through the principal focus of the concave mirror
What is the path of the ray that approaches a mirror parallel to the principal axis?
It reflects out through the focus.
A ray of light traveling parallel to the principal axis of a concave mirror will be reflected out through the mirror's?
focus
Rays traveling parallel to the principal axis of a concave mirror will reflect out through the mirror's focus.?
true
How do convex lenses bend light rays?
convex lenses bend light through refraction 1) a light ray that is parallel to the principal axis is refracted through the principal focus F. 2) A light ray passing through the principal focus F' is refracted parallel to the principal axis 3) a light ray passing through the lens' midpoint travels straight on -K14
Describe a path of the light ray that hits a mirror after passing through its focus?
It is reflected back parallel to the principal axis. (apex)
Describe the path of the light ray that hits a mirror after passing through its focus?
It is reflected back parallel to the principal axis. (apex)
Describe a path of the light of ray that hits a mirror after passing through its focus?
It is reflected back parallel to the principal axis. (apex)
Why CONCAVE MIRRORS USED IN TORCH LIGHT?
The concave mirror reflects the bulb's light, and if the bulb is at the mirror's focus, sends it out as a parallel beam.
A ray of light traveling parallel to the principal axis of a concave mirror will be reflected out through the mirrors?
If the light approaches the mirror along the normal (perpendicular to the mirror), then it reflectsback in the same direction from which it came.In that event, the angle of reflection is still equal to the angle of incidence . . . they're both zero.
Why does a converging lens behave as a burning glass?
Convex lenses focus parallel light rays from distant sources such as the sun to a single point on the principal axis of the lens. This point is called the principal focus of the convex lens. A source such as the sun is producing enough energy to heat a substance if it is placed at the principal focus point.
Define principal focus and principal aris?
principal focus is the ray which diverge at a point on the other side of the lensPrincipal Axis lens have two centre of culvature,the line passing through them and joining these centres is called principal axis.
