- #1
no idea
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how can we find the focus ?thanks
In summary, lenses work by bending light to converge at a focal point. The focal length of a lens is the distance from the lens to its focal point, and can be determined by measuring the distance from the lens to an image produced by an object at infinity. Converging lenses bring light rays together to form a real image, while diverging lenses spread light rays apart to form a virtual image. The lens equation, 1/f = 1/u + 1/v, can be used to find the focus of a lens by rearranging it to f = 1/(1/u + 1/v).
- #2
Doc Al
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You'll have to provide a few more details if you expect an answer.no idea said:
1. How do lenses work?
Lenses work by refracting light, which means they bend light as it passes through. This allows the light to converge at a single point called the focal point.
2. What is the focal length of a lens?
The focal length of a lens is the distance from the lens to its focal point. It is measured in millimeters and determines the magnification and field of view of the lens.
3. How can we determine the focal length of a lens?
The focal length of a lens can be determined by measuring the distance from the lens to the image produced by an object placed at infinity. This distance is equal to the focal length of the lens.
4. What is the difference between a converging and diverging lens?
A converging lens, also known as a convex lens, brings light rays together and forms a real image. A diverging lens, also known as a concave lens, spreads light rays apart and forms a virtual image.
5. How can we find the focus of a lens using a lens equation?
The lens equation, 1/f = 1/u + 1/v, can be used to find the focus of a lens. f represents the focal length, u represents the distance from the object to the lens, and v represents the distance from the lens to the image. By rearranging the equation, the focal length can be calculated as f = 1/(1/u + 1/v).
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