Question 1

Which of the following statements correctly describes a convex mirror?

Accepted Answer

A convex mirror has a reflecting surface that curves outward, like the outside of a sphere.

Question 2

When parallel rays of light reflect from a concave mirror, what happens to the rays?

Accepted Answer

They converge and pass through the focal point in front of the mirror.

Question 3

Which of the following is the correct mirror equation for spherical mirrors?

Accepted Answer

$$\frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i}$$

Question 4

A student places an object between the focal point and the surface of a concave mirror. What type of image is formed?

Accepted Answer

A virtual, upright, and enlarged image.

Question 5

For a convex mirror, which of the following sign conventions is correct for the focal length $$f$$?

Accepted Answer

$$f is $$negative.

Question 6

If an object is placed very far from a convex mirror, what can be said about the image?

Accepted Answer

The image is virtual, upright, and very small, close to the focal point.

Question 7

Which principal ray in ray tracing for a concave mirror passes through the focal point after reflection?

Accepted Answer

The ray parallel to the principal axis.

Question 8

A convex mirror is used as a security mirror in a store. Which property makes it suitable for this application?

Accepted Answer

It forms virtual, upright, and diminished images, allowing a wide field of view.

Question 9

Given an object distance $$d_o = 20\ \mathrm{cm}$$ and a focal length $$f = 10\ \mathrm{cm}$$ for a concave mirror, what is the image distance $$d_i$$?

Accepted Answer

$$d_i = 20\ \mathrm{cm} (in $$front of the mirror)

Question 10

Which of the following best describes the image formed by a plane mirror?

Accepted Answer

Virtual, upright, and the same size as the object.

Question 11

What is the magnification $$m of a $$mirror if the image height $$h_i is $$twice the object height $$h_o$$ and the image is inverted?

Accepted Answer

$$m = -2$$

Question 12

Which sign convention is correct for the image distance $$d_i in $$the case of a real image formed by a concave mirror?

Accepted Answer

$$d_i is $$positive.

Question 13

A ray passes through the center of curvature of a spherical mirror. What happens to this ray after reflection?

Accepted Answer

It reflects back along its incoming path.

Question 14

If the radius of curvature $$R of a $$concave mirror is $$40\ \mathrm{cm}$$, what is its focal length $$f$$?

Accepted Answer

$$f = 20\ \mathrm{cm}$$

Question 15

Which of the following scenarios will produce an upright image with a concave mirror?

Accepted Answer

The object is placed between the focal point and the mirror.

Question 16

A student uses the mirror equation to solve for the image distance and gets a negative value for $$d_i. $$What does this indicate about the image?

Accepted Answer

The image is virtual and located behind the mirror.

Spherical Mirrors: Ray Diagrams, Image Formation, and Mirror Equation (4)

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