A person can focus an object only when it lies within 200cm from him. Which spectacles should be used to increase his maximum distance of distinct vision in...

Answer Details

A person who can only focus on an object within 200cm is nearsighted or myopic. To increase their maximum distance of distinct vision to infinity, they would need a lens that can correct their nearsightedness. A convex lens is used to correct nearsightedness by diverging the light rays before they enter the eye, allowing for proper focus on distant objects. Therefore, the spectacles that should be used to increase the person's maximum distance of distinct vision to infinity is a convex lens.