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.
NO. and its a big no as you can see. Antarctica has the least amount of animals by quite a bit.
it some thing on the lens im sure what its called but it marks the middle =)
The amount of specimen visible on a microscope is referred to as the field of view. This refers to the diameter of the circular area that is visible when looking through the microscope. The field of view may vary depending on the magnification level of the microscope lens.
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.
a lens you can see through and a mirror reflects
no it is clear.
No, the lens in your eye is necessary for focusing light onto the retina, allowing you to see clearly. Without a lens, your vision would be blurry.