Drawing a ray diagram for a convex lens:
Drawing a ray diagram for a convex lens F F Example 1
Slide 3:
F F 1 2 3 Draw a ray straight through the centre of the lens. Draw a ray that travels parallel to the axis towards the lens and refracts through the focal point behind the lens. Draw a ray through the focal point in front of the lens that refracts parallel to the axis.
Slide 4:
F F
Drawing a ray diagram for a convex lens:
Drawing a ray diagram for a convex lens F F Example 2
Slide 6:
F F 1 2 Draw a ray that travels parallel to the axis towards the lens and refracts through the focal point behind the lens. Draw a ray straight through the centre of the lens.
Slide 7:
F F
Drawing a ray diagram for a concave lens :
Drawing a ray diagram for a concave lens F F Example 1
Slide 9:
F F 1 2 3 Draw a ray straight through the centre of the lens. Draw a ray that travels parallel to the axis which refracts as if it came from the focal point in front of the lens. Draw a ray that travels towards the focal point behind the lens which refracts parallel to the axis.
Slide 10:
F F
Drawing a ray diagram for a concave lens :
Drawing a ray diagram for a concave lens F F Example 2
Slide 12:
F F 1 2 3 Draw a ray straight through the centre of the lens. Draw a ray that travels parallel to the axis which refracts as if it came from the focal point in front of the lens. Draw a ray that travels towards the focal point behind the lens which refracts parallel to the axis.
Slide 13:
F F