Lens and Refraction of Light Through a Lens

A ray of light incident on a lens parallel to its principal axis, after refraction passes through or appears to come from:

A ray of light after refraction through a lens emerges parallel to the principal axis of the lens. The incident ray either passes through or appears to meet at:

In the figure below, $F_1$ and $F_2$ are the two foci of thin lens and $AB$ is the incident ray. Complete the diagram to show the path of the ray $AB$ after refraction through the lens.

In the figure below, $F_1$ and $F_2$ are the two foci of the thin lens and $AB$ is the incident ray. Complete the diagram to show the path of the ray $AB$ after refraction through the lens.

In the below figure, $F_1$ and $F_2$ are the positions of the two foci of the thin lens. Draw accurately the path taken by the light ray $AB$ after it emerges from the lens.

In the below figure, $F_1$ and $F_2$ are the positions of the two foci of the thin lens. Draw accurately the path taken by the light ray $AB$ after it emerges from the lens.

The diagram below shows a lens as a combination of a glass block and two prisms.

The final emergent ray either meets $X{X}^{\text{'}}$ at a point or appears to come from a point on $X{X}^{\text{'}}$. Label it as $F$. What is this point called?

The diagram below shows a lens as a combination of a glass block and two prisms.

Complete the path of the incident ray $AB$ after passing through the lens.

The diagram below shows a lens as a combination of a glass block and two prisms.

What is the line $X{X}^{\text{'}}$ called?

The diagram below shows a lens as a combination of a glass block and two prisms.

Name the lens formed by the combination.

The diagram below shows a lens as a combination of a glass block and two prisms.

The final emergent ray will either meet $X{X}^{\text{'}}$ at a point or appear to come from a point on $X{X}^{\text{'}}$. Label the point as $F$. What is this point called?

The diagram below shows a lens as a combination of a glass block and two prisms.

Complete the ray diagram and show the path of the incident ray $AB$ after passing through the lens.

The diagram below shows a lens as a combination of a glass block and two prisms.

What is the line $X{X}^{\text{'}}$ called?

The diagram below shows a lens as a combination of a glass block and two prisms.

Name the lens formed by the combination.

A parallel oblique beam of light falls on a concave lens. Draw a diagram to show the refraction of light through the lens.

A parallel oblique beam of light falls on a convex lens. Draw a diagram to show the refraction of light through the lens.

State the condition for the following:

A ray passes undeviated through the lens.

State the condition for the following:

A lens has both its focal lengths equal.

What do you mean by the focal plane of a lens?

Define the term focal length of a lens.