Plane Mirrors and Reflection Worksheet

When you move 1 meter closer to a plane mirror, how much closer do you appear to your image?

• 1 m

• 2 m

• 0.5 m

• No change

Answer explanation

When you move 1 meter closer to a plane mirror, your image also moves 1 meter closer to the mirror. Therefore, the total distance between you and your image decreases by 2 meters.

What property of image formation in plane mirrors explains why words on ambulances are reversed?

• Reflection symmetry

• Virtual image formation

• Lateral inversion

• Diffuse reflection

Answer explanation

Lateral inversion is the property of plane mirrors that causes images to be reversed left to right. This is why words on ambulances appear backward; they are designed to be read correctly in a rearview mirror.

If two plane mirrors are at 90°, how many images are formed?

• 2

• 3

• 4

• Infinite

Answer explanation

When two plane mirrors are positioned at 90°, they create three distinct images of an object placed between them. This occurs due to the reflections from both mirrors, resulting in one image from each mirror and one additional image from their interaction.

Which setup best demonstrates the law of reflection?

• Periscope

• Microscope

• Prism

• Camera

Answer explanation

The periscope uses mirrors to reflect light, demonstrating the law of reflection where the angle of incidence equals the angle of reflection. This setup clearly illustrates the principle, unlike the other options.

A ray strikes a plane mirror at 35°. What is the angle between incident and reflected rays?

• 35°

• 55°

• 70°

• 90°

Answer explanation

The angle of incidence equals the angle of reflection. Since the ray strikes the mirror at 35°, the reflected ray also makes a 35° angle with the normal. The angle between the incident and reflected rays is 35° + 35° = 70°.

A student uses a plane mirror to trace a symmetrical design. What concept does this illustrate?

• Real image

• Virtual symmetry

• Reflective symmetry

• Diffraction

Answer explanation

The student's use of a plane mirror to create a symmetrical design demonstrates reflective symmetry, where one side is a mirror image of the other, illustrating how reflections can create balanced and symmetrical patterns.

Which statement best compares real and virtual images in mirrors?

• Real images form behind mirrors.

• Virtual images can be projected.

• Real images form from converging rays.

• Virtual images are inverted.

Answer explanation

Real images form from converging rays, meaning they can be projected onto a screen. In contrast, virtual images cannot be projected and are typically upright, while real images are inverted.

A periscope fails to reflect an image clearly because mirrors are tilted incorrectly. Which law was violated?

• Refraction

• Reflection

• Dispersion

• Diffraction

Answer explanation

The periscope's failure to reflect an image clearly is due to incorrect mirror angles, violating the law of reflection. This law states that the angle of incidence equals the angle of reflection, which must be maintained for clear images.

A concave mirror produces an upright and enlarged image. The object is located:

• Beyond the center of curvature

• Between focus and mirror

• At focus

• Beyond focus

Answer explanation

A concave mirror produces an upright and enlarged image when the object is placed between the focus and the mirror. This positioning allows the mirror to create a virtual image that is larger and upright.

A convex mirror is best used for:

• Focusing sunlight

• Rearview mirrors

• Flashlights

• Solar cookers

Answer explanation

A convex mirror is best used for rearview mirrors because it provides a wider field of view, allowing drivers to see more of the area behind them, which enhances safety while driving.