Image Formation in Mirrors and Lenses

The video tutorial explains how to draw ray diagrams for concave lenses and convex mirrors. It covers the principal axis, focal length, and the process of determining image location, size, orientation, and type. The tutorial emphasizes understanding the expected outcomes before drawing the diagrams. For concave lenses, the image is always between the lens and F, right side up, smaller, and virtual. For convex mirrors, the image is between F and the mirror, right side up, smaller, and virtual.

What is the principal axis in a ray diagram?

• A line perpendicular to the lens

• A line parallel to the lens

• A vertical line through the center of the lens

• A horizontal line through the center of the lens

In a concave lens, what happens to parallel rays?

• They pass straight through without bending

• They diverge as if coming from the focal point

• They reflect back in the same direction

• They converge at a point

Where is the image located when an object is placed between F and 2F in a concave lens?

• Beyond 2F

• Between F and the lens

• On the opposite side of the lens

• At F

What is the orientation of the image formed by a concave lens?

• Inverted

• Erect

• Larger than the object

• Same size as the object

What type of image is always formed by a concave lens?

• Virtual and inverted

• Virtual and erect

• Real and inverted

• Real and erect

What is the focal length in relation to the center of curvature in a convex mirror?

• Unrelated to the center of curvature

• Half the center of curvature

• Twice the center of curvature

• Equal to the center of curvature

In a convex mirror, how is the first ray drawn?

• Directly through the center of curvature

• Directly through the focal point

• Parallel to the principal axis and then diverging as if from the focal point

• Parallel to the principal axis and then through the center of curvature

What is the nature of the image formed by a convex mirror?

• Virtual and inverted

• Virtual and erect

• Real and inverted

• Real and erect

Where does the image appear in a convex mirror?

• Between the focal point and the mirror

• At the focal point

• Beyond the center of curvature

• In front of the mirror

How does the size of the image compare to the object in a convex mirror?

• Larger than the object

• Same size as the object

• Smaller than the object

• Size varies with distance