All Flashcards
What is the effect of placing an object at the focal point of a convex lens?
No image is formed; the refracted rays are parallel.
What is the effect of a negative magnification?
The image is inverted.
What is the effect of a magnification with an absolute value greater than 1?
The image is enlarged.
What is the effect of a magnification with an absolute value less than 1?
The image is reduced.
What are the key differences between real and virtual images?
Real images: formed by converging rays, can be projected. Virtual images: formed by diverging rays, cannot be projected.
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.
Differentiate between image distance () for real vs. virtual images.
Real images: is positive. Virtual images: is negative.
Compare image orientation formed by convex and concave lenses.
Convex lens: Image can be inverted or upright. Concave lens: Image is always upright.
Compare image size formed by convex and concave lenses.
Convex lens: Image can be enlarged or reduced. Concave lens: Image is always reduced.
What is a convex lens?
A lens that converges parallel light rays to a focal point on the opposite side.
What is a concave lens?
A lens that diverges parallel light rays, making them appear to originate from a focal point on the same side.
What is a real image?
An image formed when light rays converge at a point, capable of being projected onto a screen.
What is a virtual image?
An image formed when refracted light rays diverge, appearing to originate from a point but not actually converging there; cannot be projected.
Define focal length (f).
The distance from the lens to the focal point.
Define object distance ().
The distance from the object to the lens.
Define image distance ().
The distance from the image to the lens.