Across
- 2. the point where a beam parallel to the principle axis
- 5. The change in direction of a wave passing from one medium to another
- 7. Mass divided by volume
- 10. It measures the amount of turn between two
- 11. to tend to meet in a point or line
- 12. The substance through which a wave can propagate.
- 13. An object is moving along a path
- 14. The flat surface that produces an. erect visualimage.
Down
- 1. If the size of the image formed is smaller than an object
- 3. The distance from a lens or mirror to the focal point
- 4. Which forms when the light rays appear to meet at definite point.
- 6. the return of a sound or light waves from a surface
- 7. measures the change in density of a fluid
- 8. The angle between the normal and the ray of light
- 9. Materials like air, water and clear glass
- 15. When a traveling wave is flipped upside down when being reflected back to the old medium