Across
- 5. The photosensitive cells present in eyes which are sensitive to bright light and colours.
- 6. The phenomenon of splitting up of white light into its constituent colours is called _____.
Down
- 1. An intense spark of electricity that flashes in the sky
- 2. ______ scale is used to measure the magnitude of earthquake.
- 3. Movement of _______ can cause flow of current through an electrolyte
- 4. The study of celestial objects and associated phenomenon is called ______