Reflection and refraction

• Science
• Lower Secondary (Key Stage 3)

Reflection and refraction

Light on the move.

Alter and label your reflection diagram from last lesson.

emits

eyes

luminous

reflects

We use a torch to make a ray of light

We use a ray box to make a ray of light

The normal is a real line

Angle of incidence = angle of reflection

Law of Reflection works on any kind of mirror

The Normal is 90 degrees to the surface a ray hits

Angle of Reflection>angle of incidence

TRUE

FALSE

Which of the following is an example of reflection?

1. Hearing an echo in a cave
2. Feeling the warmth of the sun
3. Seeing yourself in a mirror
4. Tasting a delicious meal

What type of wave undergoes reflection?

1. Radio waves
2. Light and sound waves
3. Heat waves
4. Electromagnetic waves

What law describes the angle of incidence being equal to the angle of reflection?

1. Snell's law
2. The law of reflection
3. Newton's law of motion
4. The law of refraction

What type of mirror has a flat, reflective surface?

1. Convex mirror
2. Dome mirror
3. Concave mirror
4. Plane mirror

.

Which type of mirror causes light rays to converge to a focal point?

1. Plane mirror
2. Concave mirror
3. Dome mirror
4. Convex mirror

What type of mirror is designed with a panoramic view in mind?

1. Plane mirror
2. Concave mirror
3. Dome mirror
4. Convex mirror

What phenomenon is described by the bouncing back of light from a smooth surface?

1. Reflection
2. Absorption
3. Refraction
4. Diffraction

What is the phenomenon when a pencil appears bent in a glass of water?

1. Absorption
2. Dispersion
3. Reflection
4. Refraction

Which color of light bends the most during refraction?

1. Green
2. Yellow
3. Violet
4. Red

What is the angle of refraction?

1. The angle between the incident ray and the mirror.
2. The angle between the refracted ray and the surface.
3. The angle between the incident ray and the refracted ray.
4. The angle between the refracted ray and the normal.

Which of the following can cause refraction of light?

1. Passing through a vacuum.
2. Passing through a medium with a different optical density.
3. Reflection off a mirror.
4. Passing through a medium with the same optical density.

What is refraction?

1. The bending of light as it passes through different mediums.
2. The absorption of light by a surface.
3. The reflection of light off a smooth surface.
4. The dispersion of light into its component colors.