Optics

Question 1

What type of image does a negative lens produce when a real object is presented?

Answer 1

A virtual, upright, and smaller image

This holds true regardless of whether the object is placed in front of or behind the first focal point.

Question 2

What is the function of field-expanding lenses, such as Fresnel lenses?

Answer 2

To enhance the field of view in applications like rear windows of vans or RVs

Fresnel lenses are designed to reduce the amount of material required while maintaining optical performance.

Question 3

What type of image is produced when a real object is placed between the first focal point and a plus lens?

Answer 3

A virtual, upright, enlarged image

This principle is the basis for single lens magnifiers.

Question 4

What type of image does a plus lens produce when a real object is placed to the left of the first focal point?

Answer 4

A real, inverted image

This principle is foundational for imaging systems such as the eye, camera, and projector.

Question 5

Fill in the blank: A real object presented to a _______ lens will always produce a virtual, upright, and smaller image.

Answer 5

negative

Question 6

Fill in the blank: The basis for single lens magnifiers is when a real object is placed between the first focal point and a _______ lens.

Answer 6

plus

Question 7

True or False: A plus lens will always produce an upright image regardless of the object’s position.

Answer 7

False

A plus lens can produce both real and virtual images depending on the object’s position relative to the focal point.