1.What is lens ?
2.How does the lens bends the light rays ?
3.What happens when parallel rays of light are incident on a lens ?
4.How can we find the focal length of a convex lens ?
5.How do lenses form images ?
Answers
Answer:
1.a curved piece of glass that makes things look bigger, clearer, etc. when you look through it
2.Refraction Rule for a Converging Lens
As the light rays enter into the more dense lens material, they refract towards the normal; and as they exit into the less dense air, they refract away from the normal. These specific rays will exit the lens traveling parallel to the principal axis.
3.Any incident ray traveling parallel to the principal axis of a converging lens will refract through the lens and travel through the focal point on the opposite side of the lens. Now suppose that the rays of light are traveling through the focal point on the way to the lens.
4.To measure the focal length of a converging (convex) lens. To measure the focal length of a converging (convex) lens. Using the formula: 1/u + 1/v = 1/f, the focal length f of the lens can be found.
5.A convex lens forms an image by refracting light rays. Light rays reflected from an object are refracted when they enter the lens and again when they leave the lens. They meet to form the image.
Answer:
Explanation:
1.a curved piece of glass that makes things look bigger, clearer, etc. when you look through it
2.Refraction Rule for a Converging Lens
As the light rays enter into the more dense lens material, they refract towards the normal; and as they exit into the less dense air, they refract away from the normal. These specific rays will exit the lens traveling parallel to the principal axis.
3.Any incident ray traveling parallel to the principal axis of a converging lens will refract through the lens and travel through the focal point on the opposite side of the lens. Now suppose that the rays of light are traveling through the focal point on the way to the lens.
4.To measure the focal length of a converging (convex) lens. To measure the focal length of a converging (convex) lens. Using the formula: 1/u + 1/v = 1/f, the focal length f of the lens can be found.
5.A convex lens forms an image by refracting light rays. Light rays reflected from an object are refracted when they enter the lens and again when they leave the lens. They meet to form the image.
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