Category: Physics

Image Formation by Spherical Mirrors

  1. A spherical mirror is a curved mirror that forms a curved reflecting surface.   2. There are two types of spherical mirrors, the convex mirror and the concave mirror. Spherical mirror Conex...

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Optical Instruments

  The Use of Lenses in Optical Instruments Magnifying Lens 1. The convex lens can be used as a magnifying glass.   2. The magnifying glass is also known as a simple microscope.   3. When a magnifying glass is held in front...

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Thin Lens Formula

  Relationship between Object Distance, u, Image Distance, v and Focal Length, f of a lens 1. The relationship between object distance, u, image distance, v and focal length, f of a lens is given as the lens formula: \(\frac { 1 }{ f } +\frac {...

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Image Formation by Lenses

  1. A lens is made of transparent material such as glass or clear plastic.   2. There are two types of lenses, convex (converging) lens and concave (diverging) lens.   3. The following diagram shows the characteristics of the...

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Total Internal Reflection

  1. The water surface can act as a perfect mirror as shown in Figure 6.22.   2. This phenomenon occurs when a ray of light hits the inside surface of water and is reflected back into the water. The light rays are said to be reflected...

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Refraction of Light

  Phenomenon of Refraction of Light 1. Figure 6.1 shows that light rays bend when travelling through a glass block.   2. When light rays travel from air into the glass block, its speed is reduced by glass particles. The change in the...

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