Lenses & Images

Front

What type of lens is described as converging and convex?

Back

A converging lens is a convex lens that bends light rays inward, allowing them to converge at a focal point.

Front

What is the focal length of a lens?

Back

The focal length is the distance from the lens to the focal point, where parallel rays of light converge.

Front

How would you classify an image that is real, inverted, and smaller than the original?

Back

This type of image is classified as a real image, which is formed when light rays converge and can be projected onto a screen.

Front

What are the labels for points A, B, and C in a lens diagram?

Back

Point A is the focal point, point B is the focal length, and point C is the principal axis.

Front

What does a positive focal length indicate about a lens?

Back

A positive focal length indicates that the lens is converging and can form real images.

Front

What is the principal axis of a lens?

Back

The principal axis is an imaginary line that passes through the center of the lens and is perpendicular to its surfaces.

Front

What is the difference between a real image and a virtual image?

Back

A real image is formed by the actual convergence of light rays and can be projected on a screen, while a virtual image cannot be projected and is formed by the apparent divergence of light rays.

Front

What happens to light rays that pass through the focal point of a converging lens?

Back

Light rays that pass through the focal point will emerge parallel to the principal axis after passing through the lens.

Front

What is the significance of the focal length in lens applications?

Back

The focal length determines the lens's ability to converge or diverge light, affecting image size and type.

Front

How does the shape of a lens affect its focal length?

Back

The curvature of a lens's surfaces affects its focal length; more curved lenses have shorter focal lengths.