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# Physics Image Formation by Lenses Essay

Image Formation by Lenses Objective: The objective of this lab is to create different images by using the converging and diverging lenses as both lenses project light. Introduction: A key formula when working with lenses is the Thin-Lens Equation: Where f is the focal length of the lens, do is the object distance and did is the image distance. From the Thin-Lens Equation we are able to mathematically see and understand many interesting and valuable situations that arise when working with lenses.

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When the object is the same distance from the lens as the image, for instance, we can easily verify that the focal length must equal half the image (object) distance or if the object is very far away from the lens (at infinity) the focal length will equal the image distance, Just to mention a few. Values of do, d’, and f are positive when located on the side of the mirror or lens where the light actually travels. All this is measured on the principle axis.

The distance in front of the lens is referred to as positive. Converging lens measured: = 3. 76 Lenses are common optical devices constructed of transparent material e. G. Glass or plastic, which refract light in such a way that an image of the source of light is formed. Normally, one or both sides of the lens has a spherical curvature.

When parallel light from a source impinges on a converging lens, the parallel rays are refracted so that all the light comes together at a focal point. The distance between the lens and the focal point is called the focal length of the lens. An imaginary line really to the light rays and through the center of the lens is called the principal axis. Another basic type of lens is the diverging lens. With a diverging lens, parallel rays are spread out by the lens.

The focus of diverging lenses is on the same side of the lens as the impinging parallel rays. The thin-lens equation relates the distance of the object from the lens, do, and the distance of the image from the lens, did, to the focal length of the lens, f. The magnification equation is: of these heights. Conclusion: In this lab, we were able to follow our objective and to create different images by sing the converging and diverging lenses as both lenses project light. Questions 1 .

Is it possible for a converging lens to form a virtual image? Explain It is possible for a converging lens to form a virtual image because a converging lens always form real images except when the object is primarily positioned within the focal length. The lens acts like a magnifying glass and enlarges the virtual image. 2. Is it possible for a diverging lens to form a real image? Explain It is not possible for a diverging lens to form a real image because the rays bend and the diverging lenses only are able to form reduced virtual images.

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Physics Image Formation by Lenses Essay
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Image Formation by Lenses Objective: The objective of this lab is to create different images by using the converging and diverging lenses as both lenses project light. Introduction: A key formula when working with lenses is the Thin-Lens Equation: Where f is the focal length of the lens, do is the object distance and did is the image distance. From the Thin-Lens Equation we are able to mathematically see and understand many interesting and valuable situations that arise whe
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