Draw and complete the following diagrams to show what happens to the beams of light as they enter the glass block and then leave it:

Copy and complete the diagram below to show what happens to the rays of light when they pass through the concave lens.

The diagram given alongside shows a ray of light entering a rectangular block of glass. a) Copy the diagram and draw the normal at the point of entry. b) Draw the approximate path of the ray of light through the glass block and out of the other side.

Complete the following ray diagram to show refraction of light through a glass slab and label the incident ray, refracted ray and emergent ray.

Explain what happens when a beam of light is passed through a colloidal solution ?

What happens when a beam of sunlight is passed through a glass prism ? What is spectrum ?

Draw a multiple bar diagram to show the following data :

Give three examples of materials that refract light rays. What happens to the speed of light rays when they enter these materials?