Application of Concave and Convex LensesApplication of concave and convex lenses are an important tool to understand the application of concave and convex lenses. These are based on the two laws: - one is the law of refraction and other is the law of reflection. The main use of lenses can be used to be focusing the light in one point or light separated in different path.
Convex lens or lenses which bulge out from the lens is called convex. Concave or basically these lenses are depressed inside and hence are called concave. It is important to note that the line joining between the centers of the spheres is called axis of the lens. Mainly the concave and convex lens axis move through the lens center, because of the way lens is making. Lenses making may be cutting in ground to give them various shape and size.
For the application of concave and convex-lenses it is important to understand the main equation of lens which is known as Lens maker’s equation. The focal length of the lens in air can be finding the formula from the lens maker’s equation.
Now the basic notations of the words are as follows:-
P is denote as the power of lens
f is denoted as the focal length of the lens,
n is denoted as refractive index of the lens material,
R1 is denoted as the radius of curvature all kind of the lens. The surface very near to the light source,
R2 is denoted as the radius of curvature of all kind of lens surface very far from the light source,
Apart from the above applications, there are various applications as well.
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Answers:Concave lenses magnify ray of light to a focus. These are used in microscopes, cameras and telescopes. If you bring the object closer to one of these, the magnification is less. Convex lenses diverge parallel light rays, giving a larger area that s visible. These are used in glasses and fish eye lenses for cameras. If you move an object closer to a convex lens, then it appears to be more of it's real size.
Answers:the image of the first lens becomes the object of the second lens you will need a good diagram to keep track of distances in this case the first image is 36.0-13.4 = 22.6 to the right of the concave lens this is a virtual object so use -22.6 so 1/f = 1/(-22.6) + 1/33.0 I get -71.7 cm for f for the concave lens the other is easy because image and object distances are given directly
Answers:1. The image is virtual, enlarged, upright, and behind the mirror. As the object moves from the focus towards the mirror, the image moves closer to the mirror and reduces in size. Case 5 in the text, cases 7-9 in the diagram below: http://www.physicsclassroom.com/Class/refln/u13l3e.cfm 2. The image is always virtual, diminished, upright, and behind the mirror. As the object moves closer to the mirror, the image moves closer, and increases in size. http://www.physicsclassroom.com/Class/refln/u13l4c.cfm
Answers:We've just done lenses in physics for GCSE, so i assume u r taking urs in summer too, so gd luck! Anyways, to create a projector, you need to be able to project an image on a screen (duh) so a concave lens cannot be used. A concave lens cannot create a 'real' image as the light rays do not converge on a point, as with a convex lens and to capture an image on a screen the light has to be focused to a point. However, a concave lens can create a 'virtual' image because as the light rays diverge out, if you look towards the source from the other side of the lens, the rays seem to be coming from a certain point, which is the focal point of a concave lens. (this is difficult to explain in words, so see if u can find a physics site for diagrams of lenses with light). To find a focal length of a convex lens is easy, simply set up a small light with an image in front of it and pass that through the lens, then on the other side, hold a piece of paper (or a screen if u have one) and find the point where the image is sharpest. measure the distance from the lens to the screen and that's the focal length. Hope this helps, it's hard to explain without diagrams