LENSES FLASHCARD

Front

What is the image distance when an object is located at 2f from a convex lens?

Back

2f

Front

Describe the characteristics of an image formed by a convex lens when the object is beyond 2f.

Back

The image is inverted and smaller.

Front

What is another term for Hypermetropia?

Back

Far-sightedness

Front

Describe the characteristics of an image formed by a convex lens when the object is between f and 2f.

Back

The image is inverted and bigger.

Front

What does it mean if the focal point is behind the eyeball?

Back

It indicates Hyperopia (far-sightedness).

Front

What is the focal length of a convex lens?

Back

The distance from the lens to the focal point where parallel rays converge.

Front

What is Myopia?

Back

Near-sightedness, a condition where distant objects appear blurry.

Front

How does a convex lens affect light rays?

Back

It converges light rays to a focal point.

Front

What happens to the image when the object is at the focal point of a convex lens?

Back

No image is formed; the rays diverge.

Front

What is the relationship between object distance (u), image distance (v), and focal length (f) in lens formula?

Back

1/f = 1/v + 1/u.