Optics Flashcard: Lenses and Light

Front

What is a converging lens?

Back

A converging lens is a lens that bends light rays inward, causing them to meet at a point called the focal point.

Front

What is the focal point of a lens?

Back

The focal point is the point where parallel rays of light converge after passing through a converging lens.

Front

What happens to light rays when they pass through a converging lens?

Back

They converge at a focal point.

Front

What is a real image?

Back

A real image is an image that can be projected onto a screen and is formed when light rays converge.

Front

What is a virtual image?

Back

A virtual image is an image that cannot be projected onto a screen and is formed when light rays appear to diverge from a point.

Front

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

Back

A real image can be projected onto a screen and is inverted, while a virtual image cannot be projected and is upright.

Front

What optical instrument uses a converging lens?

Back

A magnifying glass uses a converging lens to enlarge images.

Front

What is nearsightedness?

Back

Nearsightedness is a vision condition where close objects are seen clearly, but distant objects appear blurry.

Front

How can nearsightedness be corrected?

Back

Nearsightedness can be corrected with diverging lenses, not converging lenses.

Front

What is the effect of placing an object at twice the focal length of a converging lens?

Back

The image formed is real, inverted, and the same size as the object.