A magnifying lens
The amount of curve (convex) in the lens determines the strength of the lens, thereby determining the effectiveness (or strength) of the lens. This is how the prescription strength of contact lenses is determined.
2.4 mm All kidding aside: the 3.5mm lens has a wider angle than the 6mm one. This means that in a picture, you will see a larger area with the 3.5mm lens, but with the 6mm lens you'd see more (sharper) detail.
If your speaking in terms of microscopes, the low power lens allows you to see a larger amount of the subject with less detail, while a high powered lens allows you to see the subject very precisely but a smaller fraction of it.
The amount the lens magnifies your vision by. For example "x20" means "times twenty" as in being able to see the object being examined 20 times larger.
A 1300mm lens can see to infinity.
it some thing on the lens im sure what its called but it marks the middle =)
NO. and its a big no as you can see. Antarctica has the least amount of animals by quite a bit.
When you see through a concave lens you see a magnified view of what you wish to see
a lens you can see through and a mirror reflects
no it is clear.
Depends on the shape of the area (see the answer to the same question relating to 2 acres). If the area was an infinitely thin strip, the length of fencing would be infinite. For a circular area, the least amount of fencing would be needed.
heyy x a lens help you see in the light