Spring 2 / UKS2 / Science / Light / S3 and S4

When does light change speed and direction?

• When it travels through translucent materials.

• When it travels through transparent materials.

• When it travels through opaque materials.

• I don't know yet.

What is the scientific word that describes light changing speed and direction through transparent objects?

• Reflection

• Absorption
• Diffraction
• Refraction

What does light do when it refracts? Select two.

• It disappears forever.

• It bends.

• It flickers on and off.

• It can cause illusions.

Define illusion.

• Something that you think is real or happening but is not.

• Something that is real and is happening.

What is reflection?

• The process of light passing through a something.

• The image you can see in a mirror or other shiny surface.

• The absorption of light by a surface.

• The bending of light around an object.

What happens when light reflects?

• It disappears completely.

• It changes colour.

• It absorbs all the energy.

• It changes direction.

True or false? All objects have the same reflectiveness as others.

• True

• False

Define incident ray.

• A ray of light that reflects off a surface.
• Light that hits an object.

• A ray of light that changes direction.
• A ray of light that passes through a medium.

Define reflected ray.

• The light ray that passes through a surface without any change in direction.

• The light ray that bends when it hits a surface.

• The light ray that splits into multiple rays upon hitting a surface.

• The light ray that bounces off a surface at the same angle it hits the surface.