2. The refraction of light between air and glass is the basis of the corrective lenses. The surface of the glass can be curved more or less to bring rays of light into focus at any distance from the lens. So, a lens can be thought of as a piece of a glass sphere with a certain radius as shown in figure 1 below. The bigger the radius, the less curved the lens is. In figure 2, I've zoomed in on the lens. I've drawn two parallel light rays entering the lens from the upper and lower half. If the incident angle of the light rays is 5°, at what distance from the back side of the lens will the light rays come into focus (answering in millimeters will likely be most convenient). Remember that refraction will occur when the light passes from the air to the glass, then again when it passes from the glass to the air. The indices of refraction of air and glass are 1 and 1.52, respectively. Lens R Figure 1 Oi x=4mm h = 2mm Figure 2 d=?
Ray Optics
Optics is the study of light in the field of physics. It refers to the study and properties of light. Optical phenomena can be classified into three categories: ray optics, wave optics, and quantum optics. Geometrical optics, also known as ray optics, is an optics model that explains light propagation using rays. In an optical device, a ray is a direction along which light energy is transmitted from one point to another. Geometric optics assumes that waves (rays) move in straight lines before they reach a surface. When a ray collides with a surface, it can bounce back (reflect) or bend (refract), but it continues in a straight line. The laws of reflection and refraction are the fundamental laws of geometrical optics. Light is an electromagnetic wave with a wavelength that falls within the visible spectrum.
Converging Lens
Converging lens, also known as a convex lens, is thinner at the upper and lower edges and thicker at the center. The edges are curved outwards. This lens can converge a beam of parallel rays of light that is coming from outside and focus it on a point on the other side of the lens.
Plano-Convex Lens
To understand the topic well we will first break down the name of the topic, ‘Plano Convex lens’ into three separate words and look at them individually.
Lateral Magnification
In very simple terms, the same object can be viewed in enlarged versions of itself, which we call magnification. To rephrase, magnification is the ability to enlarge the image of an object without physically altering its dimensions and structure. This process is mainly done to get an even more detailed view of the object by scaling up the image. A lot of daily life examples for this can be the use of magnifying glasses, projectors, and microscopes in laboratories. This plays a vital role in the fields of research and development and to some extent even our daily lives; our daily activity of magnifying images and texts on our mobile screen for a better look is nothing other than magnification.
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