Physics

Article about Properties of image formed by convex mirror

The object distance is smaller than the focal length of the convex mirror (do < f)

Based on the calculation of the image formation by the convex mirror, can be concluded that if the object distance (do) is smaller than the focal length (f), the properties of the image are:

– Virtual means the beam of light does not pass through the image because the image is behind the convex mirror

– Upright

– The farther the object is from the convex mirror, the smaller the image size

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Article about The convex mirror equation

First, understand the sign rules of the convex mirror.

The sign rules for the convex mirror

– Object distance (do)

If an object is in the front of a mirror surface which reflecting light, where the light passes through the object, then the object distance (do) is positive.

– Image distance (di)

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Article about Image formation by the convex mirror

To understand the formation of image by the convex mirror, learn the example problems and solution below. In this case, an object is assumed to be at a certain distance from the convex mirror,

then draw the image formation by the convex mirror, the image distance from the convex mirror and the magnification of image by the convex mirror.

Suppose a convex mirror has a radius of 30 cm. Draw the image formation then determine the image distance and the magnification of the image, if:

a) The object distance is smaller than the focal length (do < f)

b) The object distance is the same as the focal length (do = f)

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Article about Ray diagrams for the convex mirror

If an object is in the front of a convex mirror surface that reflects light, the convex mirror will form the image of the object. If the distance of the object from the convex mirror is known, how to draw the image formation of the object? Suppose an object is in the front of a convex mirror, as shown in the figure below.

The orange line = convex mirror

Blue line = the principal axis

Green arrow = object

R = center of curvature of the convex mirror

f = focus of the convex mirror

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Definition of the convex mirror

One type of mirror used in everyday life is the convex mirror. The convex mirror has curved shapes, where the mirror surface, which reflects light, curve forward.

Uses of the convex mirror

If you have ever seen a motorcycle or car rearview mirror, of course, you already know the use of the convex mirrors in everyday life. The mirrors are used as rearview mirrors because the images formed by convex mirrors are upright, and the images are smaller than objects so that it has the broader range of views. In addition to the smaller image size, all image formed by the convex mirrors are virtual.

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Article about Properties of image formed by concave mirror

Object distance is smaller than the focal length of the concave mirror (do < f)

Based on the calculation of the image formation by the concave mirror, it is concluded that if the object distance (do) is smaller than the focal length (f), then the properties of the image are:

– Virtual means that the beam of light does not pass through the image

– Upright

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Article about The concave mirror equation

Before deriving the equation of the concave mirror, first read some sign rules for the concave mirror below.

The sign rules for the concave mirror

– Object distance (do)

If the object is in the front of the mirror surface which reflects light, the object distance (do) is positive.

– Image distance (di)

If the image is in the front of the mirror surface which reflecting light, where light passes through the image, then the image distance (di) is positive (real image). If the image is behind the mirror surface which reflecting light, where light does not pass through the image, then the image distance is negative (virtual image).

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To understand the image of an object formed by a concave mirror, learn example problems and solutions below. In this issue, the object is assumed at a certain distance from the concave mirror, then draw the image formation by the concave mirror,

the image distance from the concave mirror and the magnification of the image formed by the concave mirror.

Consider a concave mirror has a focal length of 20 cm. Draw the image formation and then determine the image distance and the image magnification if:

a) the distance of objects is smaller than the distance of the focal length (do <f)

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Article about Ray diagrams for concave mirror

If an object is in front of a concave mirror that reflecting light, the concave mirror will form the image of the object. If the position of the object in front of the concave mirror is known, how to draw the image formation of the object? To clarify this, suppose an object is in front of a concave mirror, as shown below.

Orange line = concave mirror

Blue lines = the principal axis

Arrow (green) = object

R = center of the curvature of the concave mirror

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Definition of a concave mirror

One type of mirror used in everyday life is a concave mirror. A concave mirror is a curved shape mirror, where a mirror surface reflects light curves backward.

Uses of the concave mirror

If you want to observe your facial skin more clearly and in detail, close your face to the surface of a concave mirror that

reflects light so that the image of your face looks bigger and the pores of the facial skin can be seen clearly. The image of your face looks bigger than your face because the mirror enlarges the image, where this happens when the distance of your face from the concave mirror is smaller than the focal length of the mirror. Because it can enlarge images, concave mirrors are usually used by women to dress up and use to men when shaving.

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