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See Answer. A ray of light drawn from the sun's position at 7 pm to the distant window reflects off the window and travel to the observer's eye. On the other hand, a ray of light drawn from the 1 pm sun position to the window will reflect and travel to the ground, never making it to the distant observer's eye. 4.
- The Role of Light to Sight
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- Specular Vs. Diffuse Reflection
Reflection off of smooth surfaces such as mirrors or a calm...
- The Line of Sight
The incident ray intersects the mirror at the same location...
- Lesson 2
It is customary to draw a bold line for the reflected ray...
- Why is an Image Formed
In the diagram below, there is an image of an object located...
- The Role of Light to Sight
Apr 15, 2015 · Rays from a common point on the object are traced using the rules in the text. Ray 1 approaches parallel to the axis, ray 2 strikes the centre of the mirror, and ray 3 goes through the focal point on the way toward the mirror. All three rays cross at the same point after being reflected, locating the inverted real image.
- OpenStax
- 2016
- Terms Used in Reflection
- Specular Reflection
- Diffuse Reflection
Incident Ray:The ray of light that is incident on the interface.Reflected Ray:The ray of light that is reflected from the interface.Normal:The perpendicular to the interface.Angle of Incidence:The angle that the incident ray makes with the normal.In the case of specular reflection, the angle of reflection is equal to the angle of incidence, thus giving a mirror-like reflection.
In the case of diffuse reflection, the incident ray reflects from the interface in all directions. In other words, the angles of reflections are different for each reflected ray.
The ray nature of light is used to explain how light reflects off of planar and curved surfaces to produce both real and virtual images; the nature of the images produced by plane mirrors, concave mirrors, and convex mirrors is thoroughly illustrated.
- Figure \(\PageIndex{1}\): Two sets of rays from common points on an object are reflected by a flat mirror into the eye of an observer. The reflected rays seem to originate from behind the mirror, locating the virtual image.
- Figure \(\PageIndex{2}\): (a) Parallel rays reflected from a large spherical mirror do not all cross at a common point. (b) If a spherical mirror is small compared with its radius of curvature, parallel rays are focused to a common point.
- Figure \(\PageIndex{3}\): Parallel rays of light reflected from a convex spherical mirror (small in size compared with its radius of curvature) seem to originate from a well-defined focal point at the focal distance \(f\) behind the mirror.
- Figure \(\PageIndex{4}\): A case 1 image for a mirror. An object is farther from the converging mirror than its focal length. Rays from a common point on the object are traced using the rules in the text.
A ray approaching a convex diverging mirror parallel to its axis is reflected so that it seems to come from the focal point F behind the mirror. (See rays 1 and 3 in Figure 25.40.) Any ray striking the center of a mirror is followed by applying the law of reflection; it makes the same angle with the axis when leaving as when approaching.
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Large telescopes use reflection to form an image of stars and other astronomical objects. Figure 25.2.1 25.2. 1: The law of reflection states that the angle of reflection equals the angle of incidence -- θr = θi θ r = θ i. The angles are measured relative to the perpendicular to the surface at the point where the ray strikes the surface.
