Ray Diagrams for Lenses

What type of lenses cause light rays to diverge?

• Cylindrical lenses

• Concave lenses

• Convex lenses

• None of the above

What symbol is used to represent a concave lens in ray diagrams?

• Inward pointing V shapes

• Circle

• Outward pointing V shapes

• Parallel lines

What is another name for the focal point in lens diagrams?

• Principal focus

• Lens center

• Central point

• Axis point

In ray diagrams, what does the 2F point represent?

• Twice the focal length from the lens

• Half the focal length from the lens

• The center of the lens

• The focal point

How is the image formed by a concave lens described?

• Real and inverted

• Real and upright

• Virtual and upright

• Virtual and inverted

In a concave lens, if the object is placed on the axis, where will the image form?

• Outside the lens

• Above the axis

• Below the axis

• On the axis

What is the characteristic of the image formed by a concave lens regardless of the object's position?

• Always larger

• Always real

• Always virtual

• Always inverted

What is the characteristic of the image formed by a convex lens when the object is beyond twice the focal distance?

• Virtual and larger

• Real and inverted

• Virtual and upright

• Real and same size

What happens to a ray that passes through the center of a convex lens?

• It bends towards the base

• It remains undeviated

• It disappears

• It diverges

What is the effect on the ray passing parallel to the axis through a convex lens?

• It focuses at the lens surface

• It remains parallel

• It diverges away

• It passes through the focal point