When sampling in aggressive chemical environments, SKC PTFE Membrane Filters are the versatile choice. The unique properties of PTFE - strong, acid/base/solvent/temperature-resistant, hydrophobic, low background, and low tare mass - make it ideal for gravimetric, chemical, and/or microscopic analysis of sample particulate. PTFE is the optimal choice for environmental particulate matter sampling, for metalworking fluids (NIOSH Method 5524), in the pharmaceutical industry, and more. Look for SKC PTFE Filters in bulk and preloaded cassettes.

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Unlike for concave mirrors, the image will always virtual, upright, and reduced in size no matter where the object is placed in front of the mirror. Unlike concave mirrors, convex mirrors do not have a real focal point. Parallel rays diverge upon reflection but do not converge to a specific point. Convex mirrors provide a wide field of view, making them suitable for applications such as security and surveillance mirrors.

2. The object is located at the Center of Curvature “C”: If the object is positioned at the Center of Curvature “C” of a concave mirror, a real image will form at the Center of Curvature. The image will be inverted and maintains the same size as the object.

PTFE filers are the versatile choice for size-selective samplers. The material's unique properties make it ideal for gravimetric, chemical, and/or microscopic analysis of sample particulate. PTFE filers are used for environmental matter sampling, metalworking fluids, in the pharmaceutical industry, and more.

Convex Mirrors are spherical mirrors with a reflective surface that curves outward. It resembles the outer surface of a sphere. Convex mirrors mirrors are also called diverging mirrors since the rays of light diverge when it strikes the mirror’s surface. The point from which the diverging rays appear to originate is known as the virtual focal point.

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5. The object is located in front of the Focal Point “F”: If the object is located in front of the Focal Point “F”, a virtual image will form behind the mirror. The image will be upright and enlarged in size.

If the line is below the curve, the graph is concave. A LevelAQAEdexcelOCR. Points of Inflexion.

Concave Mirrors are spherical mirrors with a reflective surface that curves inward. It resembles the inner surface of a sphere. Concave mirrors are also called converging mirrors since the rays of light converge when it strikes the mirror’s surface. The point where the parallel rays converge is the focal point.

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3. The object is located between the Center of Curvature “C” and the Focal Point “F”:  If the object is located between the Center of Curvature “C” and the Focal Point “F”, a real image will form behind the Center of Curvature. The image will be inverted and enlarged in size.

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4. The object is located at the Focal Point “F”: This is a bit of a peculiar case where there is actually no image that forms. This is because the reflected rays from the object are parallel after reflection, and they do not converge to form a real image. The reflected rays appear to diverge as if coming from the focal point behind the mirror. Thus, the image is considered “at infinity”.

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Mirrors can either have a plane surface or a curved surface. These two surfaces correspond with two types of mirrors, respectively: a plane mirror or a spherical mirror. Plane mirrors have a flat reflective surface and reflect light without distorting the image. It follows the law of reflection, which states that the angle of incidence is equal to the angle of reflection. On the other hand, spherical mirrors have curved reflective surfaces.

Spherical mirrors can be broken down even further into two types: concave and convex mirrors. Before diving into the types of spherical mirrors, it’s important to understand a few basic terms.

Depending on where the object is placed in front of a concave mirror, the image’s location, orientation, size, and type will all be different. There are 5 main cases:

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