Understanding Lenses and Light

Front

What is the action of a thin converging lens on a parallel beam of light?

Back

The lens converges the parallel beam of light to a focal point.

Front

What is the action of a thin diverging lens on a parallel beam of light?

Back

The lens causes the parallel beam of light to diverge.

Front

Focal length in the context of lenses

Back

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

Front

What is the principal axis of a lens?

Back

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

Front

What is the principal focus (focal point) of a lens?

Back

The principal focus of a lens is the point where parallel rays of light converge or appear to diverge after passing through the lens.

Front

Draw a ray diagram showing the formation of a real image by a converging lens.

Back

A ray diagram showing a real image formed by a converging lens, with rays converging to a point on the opposite side of the lens.

Front

What are the characteristics of a real image formed by a converging lens?

Back

Inverted; Real; Can be projected on a screen; Size can be larger or smaller than the object depending on the distance from the lens.

Front

How does a virtual image differ from a real image?

Back

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

Front

Explain how a virtual image is formed by a diverging lens.

Back

A virtual image is formed by a diverging lens when light rays diverge after passing through the lens, appearing to originate from a point behind the lens.

Front

Draw a ray diagram for the formation of a virtual image by a converging lens.

Back

The virtual image formed by a converging lens is upright, larger than the object, and located on the same side as the object.