How light interacts with concave and convex lenses Flashcards
What type of lens is thicker at the center than at the edges?
Convex lens
What type of lens is thinner at the center than at the edges?
Concave lens
True or False: Convex lenses converge light rays.
True
True or False: Concave lenses diverge light rays.
True
Fill in the blank: The point where parallel light rays converge in a convex lens is called the _______.
Focal point
What is the focal length of a lens?
The distance from the lens to the focal point.
In a concave lens, light rays appear to diverge from which point?
The focal point
Multiple choice: Which of the following is a characteristic of a convex lens? A) Diverging light B) Converging light C) No effect on light
B) Converging light
What happens to light rays that pass through the focal point of a convex lens?
They emerge as parallel rays.
True or False: The image formed by a concave lens is always virtual.
True
What type of image does a convex lens produce when the object is beyond 2F?
Real and inverted image
What is the principal axis of a lens?
The line that passes through the center of the lens and the focal points.
Fill in the blank: The distance from the center of the lens to the focal point is known as the _______.
Focal length
Multiple choice: Which lens is used in magnifying glasses? A) Concave B) Convex C) Both
B) Convex
What effect does a concave lens have on light rays?
It causes them to spread out.
True or False: A convex lens can produce both real and virtual images.
True
What type of image does a convex lens produce when the object is within the focal length?
Virtual and upright image
Fill in the blank: A lens that causes light rays to bend inward is called a _______.
Converging lens
What is the relationship between the focal length and the curvature of a lens?
The more curved the lens, the shorter the focal length.
Multiple choice: Which type of lens would you use to correct nearsightedness? A) Convex B) Concave C) Both
B) Concave
What is a key application of convex lenses?
Used in cameras and projectors.
True or False: Concave lenses can focus light to a point.
False
What type of optical device uses both concave and convex lenses?
A compound microscope
Fill in the blank: The image distance and object distance are related by the _______ equation for lenses.
Lens
