Across
- 2. Focused beam of light
- 5. Carries passengers to higher and lower floors
- 7. Optical instrument for spectrographic analysis
- 8. A flat circular plate
- 9. The basic unit of an element
Down
- 1. Electronic equipment that detects the presence of radio signals or radioactivity
- 3. defect in an optical system in which light rays from a single point fail to converge in a single focal point
- 4. The magnitude of sound (usually in a specified direction)
- 5. shock Trauma caused by the passage of electric current
- 6. An ordered array of the components of an emission or wave