仪器仪表3

  Lenses are a vital component of optics and are widely used in various fields, including astronomy, medicine, photography, and microscopy. A biconcave lens, also known as a concave lens or a diverging lens, is one of the most common types of lenses used in scientific and industrial applications. In this article, we will explore the properties, uses, and applications of the biconcave lens. Properties of Biconcave Lens: A biconcave lens  is a lens that has two concave surfaces that curve inwards, which makes it thinner at the center and thicker at the edges. This shape causes light rays to diverge after passing through the lens, which is why it is called a diverging lens. The degree of divergence is dependent on the curvature of the lens surfaces and the refractive index of the material used. The focal length of a biconcave lens is negative, meaning that the point at which the light rays converge is behind the lens, in the direction from which the light is coming. This is in contrast to