What is a concave surface?

• A flat surface

• A surface curving away from the object

• A surface curving toward the object

• A surface with no curvature

How do light rays behave when they strike a spherical surface parallel to the optical axis?

• They are absorbed by the surface.

• They are scattered in all directions.

• They are directed toward the focal point.

• They pass through the surface unchanged.

What is an approximation commonly used in geometric optics regarding parallel rays?

• Parallel rays are always absorbed.

• Parallel rays are exactly reflected toward the focal point.

• Parallel rays are approximately reflected toward the focal point.

• Parallel rays are scattered randomly.

What is the role of the focal length in describing the behavior of mirrors and lenses?

• It is used to describe the color of light.

• It is used repeatedly in describing their behavior.

• It is not used in optical descriptions.

• It is only used for flat mirrors.

What happens to light rays when they pass through a spherical lens?

• They converge at a single point

• They arrive at slightly different points along the optical axis

• They do not refract

• They focus perfectly at the center

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

• Larger and real

• Smaller and virtual

• Larger and virtual

• Smaller and real

Why are convex mirrors used in parking facilities and retail shops?

• They provide a magnified view.

• They provide a wide-angle view.

• They provide a focused view.

• They provide a distorted view.

What is the formula for magnification $ M $ in terms of image distance $ d_i $ and object distance $ d_o $?

• $ M = d_i \times d_o $

• $ M = d_o - d_i $

What operation is performed to simplify the expression for $ d_i $ after multiplying the numerator and denominator by $ f $?

• Simplifying by $ f $

• Adding $ f $

• Subtracting $ f $

• Dividing by $ f $

What is the effect of a lens when rays do not diverge from a common point?

• The image is clear

• The image is distorted

• The image is out of focus

• The image is magnified