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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 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 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 ($s_o$).
The distance from the object to the lens.
Define image distance ($s_i$).
The distance from the image to the lens.