1.the power of a lens is 10 then calculated its focal length?
2.which lens is used 70 cottect myopia?
3.name the lens which can form real and virtuval image?
Answers
Explanation:
A contact lens, or simply contact, is a thin lens placed directly on the surface of the eye. Contact lenses are ocular prosthetic devices used by over 150 million people worldwide,[1] and they can be worn to correct vision, for cosmetic, or therapeutic reasons.[2] In 2004, it was estimated that 125 million people worldwide use contact lenses, including 28 to 38 million in the United States.[3] In 2010, the worldwide market for contact lenses was estimated at $6.1 billion, while the US soft lens market was estimated at $2.1 billion.[4] Multiple analysts estimated that the global market for contact lenses would reach $11.7 billion by 2015.[4] As of 2010, the average age of contact lens wearers globally was 31 years old, and two-thirds of wearers were female.
Answer:
1. p= 1/f f=1/40
2. in image
3. Convex lens produces real and virtual image. Because When a object is close to the converging lens it behaves like a magnifying glass.
