Task 1. MATCHING TYPE. Match each Term on the left with the best Descriptor on the right. Each Descriptor may be used only once. WRITE THE LETTER OF YOUR
ANSWERS ONLY

1. Lens
2. Focal Length
3. Convex Lens
4. Concave Lens
5. Focal Point
6. Vertex
7. Orientation
8. Principal axis

A. Point where the converging light rays meet
B. Lens that is thinner in the middle than at the edge
D. Lens that is thicker in the middle than at the edge
E. Distance from the center of the lens to the focal point
F. Line that passes through the optical center
G. images formed by lenses may be inverted or upright
H. Geometric center of the lens