Q: The law of reflection states that the angle of incidence $$\theta_{\text{inc}} is $$equal to the angle of reflection $$\theta_{\text{refl}}. $$Which equation correctly represents this law?

$$\theta_{\text{inc}} = \theta_{\text{refl}}$$

Question 1

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

Accepted Answer

The image is virtual, erect, and the same size as the object.

Question 2

A concave mirror forms an image of an object placed beyond its center of curvature. Which of the following describes the image?

Accepted Answer

Real, inverted, and smaller than the object.

Question 3

The law of reflection states that the angle of incidence $$	heta_{	ext{inc}} is $$equal to the angle of reflection $$	heta_{	ext{refl}}. $$Which equation correctly represents this law?

Accepted Answer

$$	heta_{	ext{inc}} = 	heta_{	ext{refl}}$$

Question 4

If an object is placed 10 cm in front of a plane mirror, what is the distance between the object and its image?

Accepted Answer

20 cm

Question 5

Which sign convention is correct for the object distance $$DO (or$$ $$s) in $$mirror problems?

Accepted Answer

Positive if the object is on the same side as the incident ray.

Question 6

A convex mirror always forms which type of image for a real object?

Accepted Answer

Virtual and erect

Question 7

The lateral magnification $$m of a $$mirror is given by $$m = \frac{y'}{y}. If $$the image height $$y' is -2 cm $$and the object height $$y is 4 cm$$, what is the magnification?

Accepted Answer

$$m = -0.5$$

Question 8

In a curved mirror, which type of rays are used to locate the image for a real object?

Accepted Answer

Solid lines

Question 9

A person stands in front of a convex mirror in a store. Compared to their actual size, how will their image appear?

Accepted Answer

Smaller and erect

Question 10

Which of the following best explains why the image in a plane mirror appears reversed left-to-right?

Accepted Answer

The mirror reverses the image front-to-back.

Question 11

A concave mirror is used as a makeup mirror. If the object is placed between the focal point and the mirror, what type of image is formed?

Accepted Answer

Virtual, erect, and larger than the object.

Question 12

Which equation correctly relates the object distance $$DO$$ and image distance $$DI$$ for a plane mirror?

Accepted Answer

$$DO = -DI$$

Question 13

In the context of geometric optics, what is the 'normal'?

Accepted Answer

A line perpendicular to the mirror surface at the point of incidence.

Question 14

A car's side mirror is a convex mirror. What is the main advantage of using a convex mirror for this purpose?

Accepted Answer

It provides a wider field of view.

Question 15

If the object distance $$DO is $$positive, where is the object located relative to the mirror?

Accepted Answer

On the same side as the incident ray.

Question 16

Which of the following is true for the image formed by a convex mirror?

Accepted Answer

The image is always virtual and smaller than the object.

Question 17

A ray of light strikes a mirror at an angle of $$30^\circ to $$the normal. What is the angle between the incident ray and the reflected ray?

Accepted Answer

$$60^\circ$$

Question 18

Which of the following best describes the image formed by a concave mirror when the object is placed at the focal point?

Accepted Answer

The image is real and located at infinity.

Question 19

A student observes that the image in a plane mirror appears to be the same distance behind the mirror as the object is in front. Which principle explains this observation?

Accepted Answer

Law of reflection

Question 20

In a spherical mirror, which type of image is formed when the object is placed between the center of curvature and the focal point of a concave mirror?

Accepted Answer

Real, inverted, and larger than the object.

Optics - Geometric Optics: Reflection from Plane and Curved Mirrors

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