Refraction

Reflection and Refraction

How does light travel in different objects?

Poll

How are you feeling today?

Multiple Choice

Where does photosynthesis take place?

• cytoplasm

• vacuole

• chloroplast

• cell wall

Multiple Choice

The role of the iris is?

• To send impulses between the eye and brain.

• To control how much light enters the eye.

• Flexible and can change its shape to focus an image.

• A tough white outer layer which protects the eye.

Multiple Choice

Myopia is when someone is.....

• longsighted

• shortsighted

Multiple Choice

Refraction is......

• When a wave or light ray moves from one medium to another its speed changes.

• When light from an object is reflected by a surface, it changes direction. It bounces off the surface at the same angle as it hits it.

Multiple Choice

Reflection is......

• When a wave or light ray moves from one medium to another its speed changes.

• When light from an object is reflected by a surface, it changes direction. It bounces off the surface at the same angle as it hits it.

Poll

Which travels faster?

• Light

• sound

Multiple Choice

Which surface will provide a clear reflection?

• shiny

• dull

Multiple Choice

Which surface will provide a diffused reflection?

• shiny

• dull

Multiple Choice

Diffuse reflection is....

• light is scattered in different directions

• light reflect in one direction

• light doesn't reflect at all

Open Ended

Write your own law for reflection.

Multiple Choice

Angle of reflection is equal to the....

• angle of sound

• angle of incident

• angle of refraction

Multiple Choice

light travels in....

• waves

• zig-zags

• straight lines

Open Ended

Give an example where reflection is used.

Multiple Choice

why does light change direction when going from air to water?

• water is less dense than air

• water is more dense than air.

Multiple Choice

Refraction is when light.....

• goes in straight lines.

• stops

• bends

Multiple Choice

When light is leaving water to go into air it....

• leaves the water at different angle to what it entered the water.

• leaves the water at the same angel it entered the water

• doesn't leave the water.

• not a clue (explain again)

Poll

True or False - How much light refracts depends on the medium it is entering.

• True

• False

Multiple Choice

Why is the fish not in place that brain imagines?

• due to reflection

• due to refraction

• because its moved.

Multiple Choice

Convex lenses are....

• thicker in the middle

• thinner in the middle

Multiple Choice

Concave lenses are....

• thicker in the middle

• thinner in the middle

Poll

Convex lenses cause light rays to.....

• come closer together

• spread out

Poll

Concave lenses cause light rays to.....

• come closer together

• spread out

Multiple Choice

Concave lenses causes light rays to refract

• thicker in the middle

• thinner in the middle