Physical Science: Convex & Concave Lenses

Front

What is a convex lens?

Back

A convex lens is a lens that is thicker in the middle than at the edges, causing light rays that pass through it to converge or come together.

Front

What is a concave lens?

Back

A concave lens is a lens that is thinner in the middle than at the edges, causing light rays that pass through it to diverge or spread out.

Front

How do light rays behave when passing through a convex lens?

Back

Light rays passing through a convex lens converge to a point called the focal point.

Front

How do light rays behave when passing through a concave lens?

Back

Light rays passing through a concave lens diverge and appear to come from a focal point behind the lens.

Front

What is the focal point of a lens?

Back

The focal point is the point where light rays either converge (in a convex lens) or appear to diverge from (in a concave lens).

Front

What is the difference between real and virtual images?

Back

Real images are formed when light rays converge and can be projected on a screen, while virtual images are formed when light rays diverge and cannot be projected.

Front

What is magnification in the context of lenses?

Back

Magnification is the process of enlarging the appearance of an object through a lens.

Front

What is the significance of the lens shape in image formation?

Back

The shape of the lens determines how light rays are refracted, affecting whether the image is real or virtual, and its size.

Front

What is the principle of refraction?

Back

Refraction is the bending of light as it passes from one medium to another, which occurs in lenses.

Front

What is the relationship between the curvature of a lens and its focal length?

Back

The greater the curvature of a lens, the shorter its focal length; conversely, a flatter lens has a longer focal length.