All Solutions
Section 18.3: Applications of Lenses
Light rays refracted in nearsighted eye meed before the end of an eye bowl so nearsighted person needs a lens that prolongs the angle of incidence. This is achieved with a concave lens.
The far-sighted eye, on the other hand, needs a lens that will shorten the distance from where the refracted rays meet. So a far-sighted person needs convex lenses to see better.
In a person with **nearsightedness**, these rays focus in front of the retina, so a **concave** lens is needed to diverge the light rays, so that they focus farther along, on the retina.
In a person with **farsightedness**, these rays focus behind the retina, so a **convex** lens is needed to converge the light rays, so that they focus earlier, on the retina.
Farsighted – convex
To make the tree a real image and to move it more farther to lens, we need to move lens closer to the film.
We can increase the brightness of the image by adding more light respectively using a brighter lamp.
By using a brighter lamp.