All Flashcards
What are the key differences between real and virtual images?
Real Image: Formed by converging light rays, can be projected on a screen. Virtual Image: Formed by diverging light rays, cannot be projected on a screen.
Compare and contrast convex and concave lenses.
Convex Lenses: Converge light, can form real or virtual images. Concave Lenses: Diverge light, only form virtual images.
What is the effect of a convex lens on parallel light rays?
The rays converge at the focal point.
What is the effect of a concave lens on parallel light rays?
The rays diverge, appearing to originate from a focal point on the same side of the lens.
What happens when |M| > 1?
The image is larger than the object (enlarged).
What happens when |M| < 1?
The image is smaller than the object (reduced).
What does a negative magnification (M) indicate?
The image is inverted.
What does a positive magnification (M) indicate?
The image is upright.
What are the steps to find an image using a ray diagram?
- Draw a ray parallel to the principal axis, refracting through the far-side focal point. 2. Draw a ray through the center of the lens, continuing straight. 3. Draw a ray through the near-side focal point, refracting parallel to the principal axis. 4. Locate the image at the intersection of the rays.
How do you determine image characteristics using a ray diagram?
- Observe if the image is flipped (inverted) or has the same orientation (upright). 2. Compare the image size to the object size (enlarged, reduced, or same size). 3. Determine if the image is real (on the opposite side) or virtual (on the same side).