Nfocal length of convex lens experiment pdf merger

Calculate the focal length of the convex lens by using the formula given. In the case of the binary diffractive convex lens with 2 mm focal length, it is pos. Experiment with the laser beam direction until no light emerges at. Measure the approximate focal length of the lens by focusing a distant object onto a screen and measuring the distance from the lens to the screen using the metre stick. By contact method with a convex lens of known focal length.

Detailed study of aberrations is offered in part ii of the lenses experiment. Repeat the measurement by adjusting the distance between lamphousing and the screen s to roughly about 5. In particular we will find the focal length of a lens converging using the lens equation. To accomplish this, a real image from a converging lens will. A dynamical theory of the electromagnetic field pdf. To determine the focal length of converging lens and its radius of curvature. You can try to combine a number of plastic filters to.

Equipment materials ray box with illuminated object, white screen, lens holder, metre rule and lens background the purpose of the experiment is to study image formation by a thin lens. Describe the shapes of three typical converging positive thin lenses and three typical diverging. Focal length of convex lensb11 lab report objectives of the experiment. Where f is the focal length, u is the distance between the object and the lens v is the distance between the image and the lens. Measure the focal length from the center of the convex lens to the focal point. To determine the focal length of a spherical convex lens u2666 by u201clens formula methodu201d filename.

To determine the focal length of a lens using the ray box. Class xii physics lab focal length of convex lens youtube. We can conclude the focal length of the convex lens which are 9. Convex lens, optical bench, light source, target image slide, lens mounts, and screen. At the end of the experiment when they took off the inverting glasses again it took about a. Optics is the branch of physics that studies the behaviour and properties of light, including its. To investigate the image formed by a certain thin convex lens and to determine its focal length. The relationship between u and v and the focal length f for a convex lens is given by. Thus a thin lens is converging if its focal length is positive, diverging if it is negative. Diverging lens to determine the focal length of a diverging lens, the lens must create a measurable, real image as in part 1.

Note that in step 2, the rays leaving the lens are diverging and they will not cross. Practical inter student find focal length of a convex lens. After doing this experiment, you should be able to determine the focal length of a given. However, light cannot be focused through a diverging lens to form a real image unless that light was already converging. Object image and focal distance relationship proof of formula. If i combine 2 of such convex lenses, how does the image of the 1st lens act as the.

Focal length is the distance between optical centre of lens. Pdf fabrication of binary diffractive lenses and the application to. Since a concavelens cannot for ma real image on a screen, we have to combine it with. The purpose of this experiment is to determine the focal length of a thin lens and to measure the magnification for a certain combination of object and image distances. Use the lensmakers equation to determine the focal length of a thin lens. However, there is a diffractive optical element that can combine these two functions. Finding the focal length of a lens using the ray box. To find the focal length of a convex lens by plotting graphs between u and v or.