Lens Projection system Suppose we wish to project an image o

Lens Projection system Suppose we wish to project an image onto a screen, so that it can be viewed by an audience. We will project the image by using a glass lens What type of image will be projected onto the screen? Why? What type of lens should we use? Is the focal length positive or negative? Is the lens concave or convex? Why? Suppose we want the focal length to be 10 cm. The lens is symmetric and made of glass with index equal to 1.5. What is the radius of curvature of the lens surfaces? Suppose the image is 10 m from the lens. Where should the object be located? What is the magnification? Use a ruler to draw a neat and clear ray diagram which shows the character of the image.

Solution

a)a real ,inverted and magnified image will be formed.

b)converging lens. Focal length is positive. It is convex lens.