Across
- 2. Light always travels in a _____ line
- 3. Non-luminous objects ____ light falling on them
- 6. Pinhole camera is a simple device consisting of a _____ box
- 7. Luminous intensity is measure of brightness from a light source
- 10. ______ objects emit their own light
- 11. Pinhole camera display a ______ image
Down
- 1. Light rays emerging from a point and spreading in all directions are call _____ beam
- 4. The process of emission of light in living organisms
- 5. _____ reflects the Sunlight falling on it
- 8. The enzyme causing chemical reaction in bioluminescent organisms
- 9. Latin word for light
- 12. single and a very narrow path of light is called light____