Lenses & Images

Front

What is dispersion in lenses?

Back

Dispersion in lenses refers to the separation of light into its constituent colors due to different focal lengths for each color, causing blurry color separation at the edges of images.

Front

What causes dispersion in lenses?

Back

Dispersion in lenses is caused by refraction.

Front

What type of lens is a droplet of water acting like?

Back

A droplet of water acts like a bi-convex lens.

Front

What are the three key points labeled in lens diagrams?

Back

The three key points are the focal point, focal length, and principal axis.

Front

What is the principle behind how lenses work?

Back

Lenses work based on the principle of refraction.

Front

What is focal length?

Back

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

Front

What does a negative focal length indicate about a lens?

Back

A negative focal length indicates that the lens can form virtual images.

Front

What is the difference between a convex lens and a concave lens?

Back

A convex lens is thicker in the center and converges light rays, while a concave lens is thinner in the center and diverges light rays.

Front

What is the focal point of a lens?

Back

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

Front

What is the principal axis of a lens?

Back

The principal axis of a lens is the straight line that passes through the center of the lens and the focal points.